Olmec influences on Mesoamerican cultures
The causes and degree of Olmec influences on Mesoamerican cultures has been a subject of debate over many decades. Although the Olmecs are considered to be perhaps the earliest Mesoamerican civilization, there are questions concerning how and how much the Olmecs influenced cultures outside the Olmec heartland. This debate is succinctly, if simplistically, framed by the title of a 2005 New York Times article: “Mother Culture, or Only a Sister?”.
Olmec heartland 
Nearly all researchers agree on a number of specific issues concerning the Olmec and the Olmec Heartland:
- The forebears of the Olmecs were indigenous to the Olmec heartland, and developed their civilization independent of other civilizations.
- The Olmec civilization arose in the Olmec heartland with the flowering of San Lorenzo Tenochtitlán in the centuries before 1200 BCE.
Beyond the heartland 
While some of the hallmarks of Olmec culture, such as colossal heads or other sculptures, earthen platforms, and monolithic "altars", are to be found only within the heartland, many Olmec-style artifacts, designs, figurines, monuments, and motifs can be found in the archaeological records of sites hundreds of kilometers/miles distant. The most prominent of these sites are:
- Tlatilco and Tlapacoya, major centers of the Tlatilco culture in the Valley of Mexico, where artifacts include hollow baby-face motif figurines and Olmec designs on ceramics.
- Chalcatzingo, in the Valley of Morelos, which features Olmec-style reliefs on monuments and exposed rock.
- Teopantecuanitlan, in Guerrero, which also features Olmec-style reliefs as well as city plans with distinctive Olmec features.
- San José Mogote, in Oaxaca, which features Olmec-style pottery. San Jose Mogote is, like the larger Olmec site of La Venta, oriented 8° west of north.
Other sites showing Olmec influence include Takalik Abaj and [Monte Alto culture|Monte Alto] in Guatemala, Las Bocas in Puebla, and Zazacatla. In all these cases, the archaeological record shows Olmec-influenced objects existing alongside objects in the local tradition. Often, for example at Las Bocas, Olmec inconography will even appear on objects created in the local tradition.
The Olmec influences in these sites all post-date San Lorenzo and the cultural pathways almost exclusively flow from the Olmec heartland to these distant sites, and not in the other direction (from, say, Chalcatzingo to San Lorenzo Tenochtitlan). This apparent one-way flow has led most researchers to declare Olmecs to be the "mother culture" of Mesoamerica.
To quote perhaps the most prominent of Mesoamerican archaeologists, Michael D. Coe, "There is now little doubt that all later civilizations in Mesoamerica, whether Mexican or Maya, ultimately rest on an Olmec base." To this, Coe's student archaeologist Richard Diehl adds "While not every archaeologist agrees with Coe, ... mounting evidence ... has convinced everyone but the most die-hard opponents".
Mother culture 
The concept of the Olmecs as a mother culture was first formally raised by Alfonso Caso at a 1942 conference on the "Olmec problem" in Tuxtla Gutiérrez where he argued that the Olmec were the "cultura madre" of Mesoamerica.
The proponents of the "mother culture" do not argue that the Olmec were the only contributors, but that the Olmecs first developed many of the features adopted by later Mesoamerican civilizations.
They argue that it was in San Lorenzo and the Olmec heartland that the hallmarks of the Olmec culture were first established, hallmarks that include the patio/plaza concept, monumental sculpture, Olmec iconography, archetypical Olmec figurines, and other portable art. After all they have made many items made of stone as other cultures did after they did.
Sister culture 
The "sister culture" proponents, on the other hand, state that Mesoamerican cultures evolved more or less simultaneously. Major proponents of this theory include Joyce Marcus and Kent V. Flannery, who argue that the Olmec were merely the first among equals, rather than the wellspring of cultural change.
- "It is the adaptive autonomy and frequent competitive interaction of such chiefdoms that speed up evolution and eventually make useful technologies and sociopolitical strategies available to all regions.".
This viewpoint is echoed by a minority of other researchers including art historian Caterina Magni who nonetheless agrees that the Olmecs bequeathed a rich heritage to later cultures. However, Magni does not agree that what is presently labelled as Olmec culture was first and foremost the product of the heartland.
- "Contrary to [this] generally accepted idea, the brilliant [Olmec] culture did not originate in the Gulf coast of Veracruz and Tabasco. In truth, the varied and voluminous archaeological data shows a much more complex reality; [instead] Olmec religious and political centers emerged simultaneously throughout a vast part of Mesoamerica: from Mexico to Costa Rica."
Olmec-style pottery analysis 
In an effort to address questions concerning the geographic origins of Olmec artifacts — with implications concerning the geographic origins of Olmec culture — in March 2005 a team of archaeologists used instrumental neutron activation analysis (INAA) to compare over 1,000 Mesoamerican Olmec-style ceramic artifacts with 275 samples of clay so as to "fingerprint" the origin of that pottery. They found that "the Olmec packaged and exported their beliefs throughout the region in the form of specialized ceramic designs and forms, which quickly became hallmarks of elite status in various regions of ancient Mexico".
In August 2005 the results of another study were published. This study used petrography to analyze 20 pottery sherds, and found that five of the samples from San Lorenzo were "unambiguously" from Oaxaca. Based on this evidence, the authors concluded that the "exchanges of vessels between highland and lowland chiefly centers were reciprocal, or two way" which "contradicts recent claims that the Gulf Coast was the sole source of pottery" in Mesoamerica.
The results of the INAA study were later defended in March 2006 in two articles in Latin American Antiquity, in particular contrasting the sample size of the INAA study (roughly 1000) with the sample size of the petrography analysis (20).
An emerging middle ground 
In the early 21st century it seems that a middle ground between the mother and sister culture positions may be emerging. Pool (2007) thus concludes that while San Lorenzo emerged early as the largest the most developed polity of Mesoamerica and the earliest evidence of several of the defining traits of Mesoamerican culture is found there, the Olmecs emerge looking less like a mother culture than as a promiscuous father culture spawning offspring generously with many different mothercultures all over mesoamerica. This formulation emphasises the viewpoint that influence from the Olmec heartland merged with many local traditions creating local expressions with both Olmec and non-Olmec roots. it follows from this approach that the type and degree of Olmec influence varies greatly from location to location within Mesoamerica.
Flow of influence 
If Olmec influences flowed out of the heartland in what is generally seen as a less than bilateral transfer, then how did this happen? How were the hallmarks of Olmec culture transmitted to sites hundreds of kilometers/miles distant from the heartland? Many theories have been advanced including:
There is little or no evidence to support Olmec military domination. Very little Olmec or other Early Formative era art shows war or sacrifice. No stelae have been found extolling rulers' victories, unlike the later Maya or the contemporaneous Egyptian or Hittite cultures.
Olmec colonization, that is the founding of new settlements by Olmec emigrants outside of the Olmec heartland, is unlikely. The archaeological records of Olmec-influenced sites show that each had pre-Olmec occupations as well as a significant number of indigenous artifacts created in a local tradition. The Tlatilco site, for example, is famous for its large number of female figurines, which are unlike any found at La Venta or San Lorenzo.
Although portable art, such as pottery, celts, or other items could have been transported the long distances between towns, the monumental art at Chalcatzingo or Teopantecuanitlan would need to be created locally. Therefore it is very likely that sculptors and artists familiar with or experienced in heartland architecture were commissioned to create similar ceremonial sites far from the heartland. But while this can explain how monumental Olmec-style art was created at Chalcatzingo, it does not explain why.
Long-distance trade 
Similarly long-distance trade can explain the Olmec-style artifacts found in Teopantecuanitlan, as well the jade and obsidian artifacts found in the Olmec heartland, which is far from any jade or obsidian source. But trade by itself fails to explain the widespread adoption of Olmec-influenced artifacts and styles throughout Mesoamerica or Olmec iconography found on locally-produced wares — while trade can explain the movement of objects, it does not explain the movement of ideas or styles. Therefore, according to archaeologist Jeffrey Blomster, "we have to move beyond a purely economic model . . . The fact that trade involves ceramic vessels which display iconography, representing an underlying ideology and religion synthesized by the Gulf Coast Olmec, suggests that something much deeper is at stake than simply maintaining exchange relationships."
Iconography in service to ideology 
To explain the adoption of Olmec iconography and concepts throughout Mesoamerica, archaeologist F. Kent Reilly proposes a "Middle Formative Ceremonial Complex". Within the Middle Formative Ceremonial Complex, the Olmec-style artifacts are used both ritually, for example in shamanic rituals, and as a validation of the power of rulers. That is, the styles and the iconography, as well as the artifacts, were used by the rising elites in the Formative chiefdoms to authenticate or to increase their power and prestige.
This is echoed, among others, by archaeologist Giselle Canto Aguilera. Working at the Zazacatla site in Morelos, she found that the inhabitants of Zazacatla adopted Olmec styles when they changed from a simple, egalitarian society to a more complex, hierarchical one: "When their society became stratified, the new rulers needed emblems ... to justify their rule over people who used to be their equals."
Olmec-influenced objects are found throughout Mesoamerica. The consensus among most, but by no means all, archaeologists and researchers is that the hallmarks of the Olmec iconography were developed within the Olmec heartland and that this iconography became, in the words of Michael Coe, an "all-pervading art style" throughout Mesoamerica in service to a "powerful, unitary religion" and an “official ideology”, an ideology that was adopted by distant indigenous chieftains and other elites eager to validate and bolster their claims to privilege.
- For example, see Diehl, The Olmecs: America's First Civilization or Lovgren: “the Olmec are generally regarded as the first advanced civilization in Mesoamerica”.
- Although nearly all researchers believe that the forebears of the Olmecs were indigenous to the Olmec heartland, noted researchers such as Guadalupe Martinez Donjuan and Miguel Covarrubias believe that the Olmecs emigrated from the modern-day state of Guerrero to settle the Olmec heartland. (see Martinez Donjuan (2000))
- While not associated with an archaeological site, the Juxtlahuaca and Oxtotitlan cave paintings are considered Olmec-inspired.
- Reilly, p. 371.
- Coe, p. 62.
- Diehl, p. 12.
- "Esta gran cultura, que encontramos en niveles antiguos, es sin duda madre de otras culturas, como la maya, la teotihuacana, la zapoteca, la de El Tajín, y otras” ("This great culture, which we encounter in ancient levels, is without a doubt mother of other cultures, like the Maya, the Teotihuacana, the Zapotec, that of El Tajin, and others".) Caso (1942), p. 46.
- "Few scholars question the hypothesis that the Mesoamerican monolithic sculptural tradition originated in the Olmec heartland". Reilly, p. 370.
- Flannery and Marcus (2000), p. 33.
- Flannery, et al. (2005).
- ". . . léguer un riche héritage aux cultures postérieures.", Magni (2004).
- "Contrairement à une idée reçue, cette culture brillante n'est pas originaire de la côte du golfe du Mexique (États actuels du Veracruz et du Tabasco). En vérité, les données archéologiques, nombreuses et variées, montrent une réalité beaucoup plus complexe. ..on peut donc affirmer que les centres religieux et politiques olmèques émergent de manière synchrone sur une vaste partie de la Méso-Amérique : du Mexique jusqu'au Costa Rica, en passant par le Belize, le Guatemala, le Salvador, le Honduras et le Nicaragua." Magni (2004).
- Magni, (2004). See also Niederberger (1987), pp 745-750 as well as Niederberger (1996).
- Devitt. For original study, see Blomster.
- Stoltman et al.
- Neff et al. (2006).
- Joyce 2010 p. 92
- Pool 2007 300-301
- Pool, p. 20. Notable exceptions include are Chalcatzingo's Monument 2, the side panel of La Venta's Altar 4, and the largest painting at Juxtlahuaca, all of which show some type of human-on-human dominance. Painting 1. Pool finds that "the archaeological evidence for warfare among the Olmecs is notable for its scarcity . . .", p. 138.
- See Townsend, p. 119.
- Quoted in Rose.
- Coe, p. 81.
- Blomster, Jeffrey P.; Hector Neff, and Michael D. Glascock (2005-02-18). "Olmec Pottery Production and Export in Ancient Mexico Determined Through Elemental Analysis". Science (Washington, DC: American Association for the Advancement of Science) 307 (5712): pp.1068–1072. doi:10.1126/science.1107599. ISSN 0036-8075. OCLC 204603069. PMID 15718462.
- Caso, Alfonso (1942). "Definición y extensión del complejo ‘Olmeca’ ". Mayas y Olmecas: segunda Reunión de mesa redonda sobre problemas antropológicos de México y Centro América (bajo la presidencia honoraria del dr. Rafael Pascacio Gamboa, Tuxtla Gutiérrez, Chiapas. 27 de abril a 1o. de mayo de 1942 ed.). México, D.F: Talleres de la Editorial Stylo. OCLC 1872886. (Spanish)
- Coe, Michael D. (1994) . Mexico: from the Olmecs to the Aztecs. Ancient peoples and places series (4th edition, fully revised and expanded ed.). London and New York: Thames & Hudson. ISBN 0-500-27722-2. OCLC 29708907.
- Devitt, Terry (2005-08-01). "New analysis of pottery stirs Olmec trade controversy". University of Wisconsin–Madison News. Madison: Board of Regents of the University of Wisconsin System. Retrieved 2007-02-21.
- Diehl, Richard (2004). The Olmecs: America's First Civilization. Ancient peoples and places series. London: Thames & Hudson. ISBN 0-500-02119-8. OCLC 56746987.
- Flannery, Kent V.; and Joyce Marcus (March 2000). "Formative Mexican Chiefdoms and the Myth of the "Mother Culture"". Journal of Anthropological Archaeology (New York: Academic Press) 19 (1): pp.1–37. doi:10.1006/jaar.1999.0359. ISSN 0278-4165. OCLC 7810050.
- Flannery, Kent V.; Andrew K. Balkansky, Gary M. Feinman, David C. Grove, Joyce Marcus, Elsa M. Redmond, Robert G. Reynolds, Robert J. Sharer, Charles S. Spencer, and Jason Yaeger (August 2005). "Implications of new petrographic analysis for the Olmec "mother culture" model" (online reproduction). Proceedings of the National Academy of Sciences (Washington, DC: National Academy of Sciences) 102 (32): pp.11219–11223. doi:10.1073/pnas.0505116102. ISSN 0027-8424. OCLC 209632728. PMC 1183595. PMID 16061797. Retrieved 2007-03-15.
- Joyce, Arthur A. (2010). Mixtecs, Zapotecs and Chatinos: Ancient peoples of Southern Mexico. Wiley Blackwell. ISBN 978-0-631-20977-5.
- Lovgren, Stefan (2007-01-26). "Ancient City Found in Mexico; Shows Olmec Influence". National Geographic News. National Geographic Society. Retrieved 2007-02-28.
- Magni, Caterina (2003). Les Olmèques: des origines au mythe. Paris: Éditions du Seuil. ISBN 2-02-054991-3. OCLC 52385926. (French)
- Magni, Caterina (2004). "Les Olmèques et la Méso-Amérique". Bibliothèque en ligne. Clio.fr. Retrieved 2007-02-21. (French)
- Martinez Donjuan, Guadalupe (1986). "Teopantecuanitlan". In Roberto Cervantes-Delgado (ed.). Primer Coloquio de Arquelogía y Etnohistoria del Estado de Guerrero (Conference proceedings: Coloquio de Arqueología y Etnohistoria del Estado de Guerrero (1st, 1984: Chilpancingo de los Bravos, Mexico) ed.). México, D.F.: Instituto Nacional de Antropología e Historia; Gobierno del Estado de Guerrero. pp. 55–80. OCLC 17475087.
- Martinez Donjuan, Guadalupe (2000), "Teopantecuanitlan", in The Oxford Encyclopedia of Mesoamerican Cultures, Carraso, David, ed., Oxford University Press.
- Neff, Hector, Jeffrey Blomster, Michael D. Glascock, Ronald L. Bishop, M. James Blackman, Michael D. Coe, George L. Cowgill, Ann Cyphers, Richard A. Diehl, Stephen Houston, Arthur A. Joyce, Carl P. Lipo, and Marcus Winter (2006) "Smokescreens in the Provenance Investigation Of Early Formative Mesoamerican Ceramics" in Latin American Antiquity, Volume 17 Number 1 March 2006.
- Niederberger, Christine (1987), Paléopaysages et archéologie pré-urbaine du bassin de México. Tomes I & II published by Centro Francés de Estudios Mexicanos y Centroamericanos, Mexico, D.F. (Resume)
- Niederberger, Christine (1996) "Olmec Horizon Guerrero", in Olmec Art of Ancient Mexico, eds. E. P. Benson and B. de la Fuente, Washington D.C., ISBN 0-89468-250-4.
- Pool, Christopher A. (2007). Olmec Archaeology and Early Mesoamerica. Cambridge World Archaeology series. Cambridge and New York: Cambridge University Press. ISBN 978-0-521-78882-3. OCLC 68965709.
- Townsend, Richard F. (1992). The Ancient Americas: art from sacred landscapes. Art Institute of Chicago.
- Reilly III, F. Kent, “Art, Ritual, and Rulership in the Olmec World” in Ancient Civilizations of Mesoamerica: a Reader, Blackwell Publishing Ltd, p. 369-395.
- Rose, Mark (2005) "Olmec People, Olmec Art", in Archaeology (online), the Archaeological Institute of America, accessed February 2007.
- Stevenson, Mark (2007) “Olmec-influenced city found in Mexico”, Associated Press, accessed February 8, 2007.
- Stoltman, J. B., Marcus, J., Flannery, K. V., Burton, J. H., Moyle, R. G., "Petrographic evidence shows that pottery exchange between the Olmec and their neighbors was two-way", Proceedings of the National Academy of Sciences of the United States of America, August 9, 2005, v. 102, n. 32, pp. 11213-11218 .
- Wilford, John Noble; “Mother Culture, or Only a Sister?”, The New York Times, March 15, 2005.
- "The Mother-Sister Controversy in Mesoamerica" - a useful survey article that finds "both factions believe pretty much the same thing — that the Olmec were first in some things in Mesoamerica and had some two-way trade with the other burgeoning societies".
- Olmec Origins in The Southern Pacific Lowlands