History of bread
The history of bread goes back at least 30,000 years. The first bread produced was probably cooked versions of a grain-paste, made from roasted and ground cereal grains and water, and may have been developed by accidental cooking or deliberate experimentation with water and grain flour. Descendants of these early flatbreads are still commonly made from various grains in many parts of the world, including lavashs, taboons, sangaks, Mexican tortilla, Indian chapati, Pakistani roti and naan, Scottish oatcake, North American johnnycake, Jewish Matzo, Middle Eastern pita, and Ethiopian injera. Flat bread of these types also formed a staple in the diet of many early civilizations with the Sumerians eating a type of barley flat cake, and the 12th century BC Egyptians being able to purchase a flat bread called ta from stalls in the village streets. The ritual bread in ancient Greek offerings to the chthonic gods, known as psadista was made of fine flour, oil and wine.
The earliest archaeological evidence for flour, which was likely processed into an unleavened bread, dates to the Upper Palaeolithic in Europe, around 30,000 years ago. During this period of human history cereals constituted just one of many food sources exploited by hunting and gathering; palaeolithic European diets were based mainly on animal proteins and fats. Cereals and bread became a staple food during the Neolithic, around 10,000 years ago, when wheat and barley were among the first plants to be domesticated in the Fertile Crescent. Wheat-based agriculture spread from Southwest Asia to Europe, North Africa and the Indian Subcontinent. In other parts of the world cereals such as rice (East Asia), maize (the Americas) and sorghum (sub-Saharan Africa), which are also sometimes made into bread, were independently domesticated and formed the basis of alternative agricultural systems. Around the world, the shift from varied hunter-gatherer subsistence to agricultural diets based predominantly on a cereal staple such as wheat bread marked an important turning point in human history. Though in many ways nutritionally deficient compared to hunting and gathering, cereal crops allowed agricultural societies to sustain much larger populations than had previously been possible, which in turn led to greater economic specialisation, social complexity and eventually the rise of civilised states.
The development of leavened bread can also probably be traced to prehistoric times. Yeast spores occur everywhere, including the surface of cereal grains, so any dough left to rest will become naturally leavened. Although leavening is likely of prehistoric origin, the earliest archaeological evidence is from ancient Egypt. Scanning electron microscopy has detected yeast cells in some ancient Egyptian loaves. However, ancient Egyptian bread was made from emmer wheat and has a dense crumb. In cases where yeast cells are not visible, it is difficult, by visual examination, to determine whether the bread was leavened. As a result, the extent to which bread was leavened in ancient Egypt remains uncertain.
The importance of bread in the formation of early human societies cannot be overstated. From the western half of Asia, where wheat was domesticated, cultivation spread north and west, to Europe and North Africa, and enabled humans to become farmers rather than hunters and foragers. This in turn led to the formation of towns, as opposed to the nomadic lifestyle, and gave rise to more and more sophisticated forms of societal organization. Similar developments occurred in eastern Asia, centered on rice, and in the Americas with maize.
The most common source of leavening in antiquity was to retain a piece of dough from the previous day to utilize as a form of sourdough starter. Pliny the Elder reported that the Gauls and Iberians used the foam skimmed from beer to produce "a lighter kind of bread than other peoples." Parts of the ancient world that drank wine instead of beer used a paste composed of grape must and flour that was allowed to begin fermenting, or wheat bran steeped in wine, as a source for yeast.
The idea of a free-standing oven that could be pre-heated, with a door for access, appears to have been a Greek one.
Even in antiquity there were a wide variety of breads. In ancient times the Greek bread was barley bread: Solon declared that wheaten bread might only be baked for feast days. By the 5th century BC bread could be purchased in Athens from a baker's shop, and in Rome, Greek bakers appeared in the 2nd century BC, as Hellenized Asia Minor was added to Roman dominion as the province of Asia; the foreign bakers of bread were permitted to form a collegium. In the Deipnosophistae, the author Athenaeus (c.A.D.170-c. 230) describes some of the bread, cakes, cookies, and pastries available in the Classical world. Among the breads mentioned are griddle cakes, honey-and-oil bread, mushroom-shaped loaves covered in poppy seeds, and the military specialty of rolls baked on a spit. The type and quality of flours used to produce bread could also vary, as noted by Diphilus when he declared "bread made of wheat, as compared with that made of barley, is more nourishing, more digestible, and in every way superior." In order of merit, the bread made from refined [thoroughly sieved] flour comes first, after that bread from ordinary wheat, and then the unbolted, made of flour that has not been sifted." The essentiality of bread in the diet was reflected in the name for the rest of the meal: ópson, "condiment", i.e. bread's accompaniment, whatever it might be.
In medieval Europe, bread served not only as a staple food but also as part of the table service. In the standard table setting of the day the trencher, a piece of stale bread roughly 6 inches by 4 inches (15 cm by 10 cm), was served as an absorbent plate. At the completion of a meal the trencher could then be eaten, given to the poor, or fed to the dogs. It was not until the 15th century that trenchers made of wood started to replace the bread variety. Bread in Europe was often adulterated with hazardous materials up to the 20th century, including chalk, sawdust, alum, plaster, clay and ammonium 
The industrialization of bread-baking was a formative step in the creation of the modern world. Otto Frederick Rohwedder is considered to be the father of sliced bread. In 1912 Rohwedder started work on inventing a machine that sliced bread, but bakeries were reluctant to use it since they were concerned the sliced bread would go stale. It was not until 1928, when Rohwedder invented a machine that both sliced and wrapped the bread, that sliced bread caught on. A bakery in Chillicothe, Missouri was the first to use this machine to produce sliced bread.
For generations, white bread was the preferred bread of the rich while the poor ate dark (whole grain) bread. However, in most western societies, the connotations reversed in the late 20th century, with whole grain bread becoming preferred as having superior nutritional value while white bread became associated with lower-class ignorance of nutrition.
Another major change happened in 1961 with the development of the Chorleywood Bread Process which used the intense mechanical working of dough to dramatically reduce the fermentation period and the time taken to produce a loaf at the expense of taste and nutrition. The process, whose high-energy mixing allows for the use of inferior grain, is now widely used around the world in large factories. In total contrast, traditional breadmaking is extremely time-consuming, as the dough is mixed with yeast and requires several cycles of kneading and resting in order to become ready for baking, and to produce the desired flavor and texture.
More recently, and especially in smaller retail bakeries, chemical additives are used that both speed up mixing time and reduce necessary fermentation time, so that a batch of bread may be mixed, made up, risen, and baked in fewer than three hours. Dough that does not require fermentation because of chemical additives is called "quick bread" by commercial bakers. Common additives include reducing agents such as L-cysteine or sodium metabisulfite, and oxidants such as potassium bromate or ascorbic acid. Often these chemicals are added to dough in the form of a prepackaged base, which also contains most or all of the dough's non-flour ingredients. Using such bases and sophisticated chemistry, it has been possible for commercial bakers to make imitations of artisan and sourdough breads, traditionally made by semi-skilled laborers working in smaller shops.
- Tannahill, Reay (1973). Food in History (Stein and Day. ISBN 0-8128-1437-1). p. 37, 61, 69.
- Thus offering the three basic foodstuffs, observes Miguelonne Toussaint-Samat, Anthea Bell, tr. 2009. The History of Food, rev, ed. p. 201.
- Revedin, A.; Aranguren, B.; Becattini, R.; Longo, L.; Marconi, E.; Lippi, M. M.; Skakun, N.; Sinitsyn, A.; Spiridonova, E.; Svoboda, J. (2010). "Thirty thousand-year-old evidence of plant food processing". Proceedings of the National Academy of Sciences 107 (44): 18815–18819. Bibcode:2010PNAS..10718815R. doi:10.1073/pnas.1006993107. PMC 2973873. PMID 20956317.
- Pettitt, Paul (2005). "The Rise of Modern Humans". In Chris Scarre. The Human Past: World Prehistory and the Development of Human Societies.
- Scarre, Chris (2005). "The World Transformed: From Forages and Farmers to States and Empires". In Chris Scarre. The Human Past: World Prehistory and the Development of Human Societies.
- Diamond, Jared (1997). Guns, Germs and Steel.
- McGee, Harold (2004). On Food and Cooking. p. 517.
- D. Samuel (2000). "Brewing and baking". Ancient Egyptian materials and technology. Eds: P.T. Nicholson & I. Shaw. (Cambridge: Cambridge University Press ISBN 0-521-45257-0) p. 558.
- Tannahill p. 68f.
- Toussaint-Samat 2009, p.202
- Toussaint-Samat 2009, p.204 gives a date of 168 for "a considerable influx of craftsmen bakers (pistores) of Greek origin into Rome".
- Chrysippus of Tyana gives a list of thirty kinds, without commentary (Toussaint-Samat 2009, p. 202).
- Tannahill p. 91
- Changes in diet are reflected in the modern significance of opson as fish (Toussaint-Samat 2009, p. 202); in Italy the contorni are now the accompaniment to meat rather than bread.
- Tannahill p. 227
- "The fight against food adulteration". Rsc.org. Retrieved 2012-10-26.
- It occupies a section in Siegfried Giedion, (1948) 1969.. Mechanization Takes Command (New York Oxford University Press).
- Christianne L.H. Hupkens, Ronald A. Knibbe and Maris J. Drop, for example analyzed social class variation in the intake of fat and fibre, including white bread consumption, in Maastricht, Liège and Aachen, "Social Class Differences in Women's Fat and Fibre Consumption: A Cross-National Study" 1995; the literature on class perceptions and diet is enormous.
- Criticisms of the Chorleywood bread process
- Pyler p. 703[full citation needed]