Soviet montage theory
Soviet montage theory is an approach to understanding and creating cinema that relies heavily upon editing (montage is French for 'assembly' or 'editing'). Although Soviet filmmakers in the 1920s disagreed about how exactly to view montage, Sergei Eisenstein marked a note of accord in "A Dialectic Approach to Film Form" when he noted that montage is "the nerve of cinema", and that "to determine the nature of montage is to solve the specific problem of cinema".
While several Soviet filmmakers, such as Lev Kuleshov, Dziga Vertov, and Vsevolod Pudovkin put forth explanations of what constitutes the montage effect, Eisenstein's view that "montage is an idea that arises from the collision of independent shots" wherein "each sequential element is perceived not next to the other, but on top of the other" has become most widely accepted.
Eisenstein's theory of montage 
In formal terms, this style of editing offers discontinuity in graphic qualities, violations of the 180 degree rule, and the creation of impossible spatial matches. It is not concerned with the depiction of a comprehensible spatial or temporal continuity as is found in the classical Hollywood continuity system. It draws attention to temporal ellipses because changes between shots are obvious, less fluid, and non-seamless.[clarification needed]
Eisenstein describes five methods of montage in his introductory essay "Word and Image". These varieties of montage build one upon the other so the "higher" forms also include the approaches of the "simpler" varieties. In addition, the "lower" types of montage are limited to the complexity of meaning which they can communicate, and as the montage rises in complexity, so will the meaning it is able to communicate (primal emotions to intellectual ideals). It is easiest to understand these as part of a spectrum where, at one end, the image content matters very little, while at the other it determines everything about the choices and combinations of the edited film.
Eisenstein's montage theories are based on the idea that montage originates in the "collision" between different shots in an illustration of the idea of thesis and antithesis. This basis allowed him to argue that montage is inherently dialectical, thus it should be considered a demonstration of Marxism and Hegelian philosophy. His collisions of shots were based on conflicts of scale, volume, rhythm, motion (speed, as well as direction of movement within the frame), as well as more conceptual values such as class.
Methods of montage 
- Metric - where the editing follows a specific number of frames (based purely on the physical nature of time), cutting to the next shot no matter what is happening within the image. This montage is used to elicit the most basal and emotional of reactions in the audience.
- Metric montage example from Eisenstein's October.
- Rhythmic - includes cutting based on continuity, creating visual continuity from edit to edit.
- Tonal - a tonal montage uses the emotional meaning of the shots—not just manipulating the temporal length of the cuts or its rhythmical characteristics—to elicit a reaction from the audience even more complex than from the metric or rhythmic montage. For example, a sleeping baby would emote calmness and relaxation.
- Overtonal/Associational - the overtonal montage is the cumulation of metric, rhythmic, and tonal montage to synthesize its effect on the audience for an even more abstract and complicated effect.
- Intellectual - uses shots which, combined, elicit an intellectual meaning.
- Intellectual montage examples from Eisenstein's October and Strike. In Strike, a shot of striking workers being attacked cut with a shot of a bull being slaughtered creates a film metaphor suggesting that the workers are being treated like cattle. This meaning does not exist in the individual shots; it only arises when they are juxtaposed.
- At the end of Apocalypse Now the execution of Colonel Kurtz is juxtaposed with the villagers' ritual slaughter of a water buffalo.
More on intellectual montage 
In his later writings, Eisenstein argues that montage, especially intellectual montage, is an alternative system to continuity editing. He argued that "Montage is conflict" (dialectical) where new ideas, emerge from the collision of the montage sequence (synthesis) and where the new emerging ideas are not innate in any of the images of the edited sequence. A new concept explodes into being. His understanding of montage, thus, illustrates Marxist dialectics.
Concepts similar to intellectual montage would arise during the first half of the 20th century, such as Imagism in poetry (specifically Pound's Ideogrammic Method), or Cubism's attempt at synthesizing multiple perspectives into one painting. The idea of associated concrete images creating a new (often abstract) image was an important aspect of much early Modernist art.
Eisenstein relates this to non-literary “writing” in pre-literate societies, such as the ancient use of pictures and images in sequence, that are therefore in "conflict". Because the pictures are relating to each other, their collision creates the meaning of the "writing". Similarly, he describes this phenomenon as dialectical materialism.
Eisenstein argued that the new meaning that emerged out of conflict is the same phenomenon found in the course of historical events of social and revolutionary change. He used intellectual montage in his feature films (such as Battleship Potemkin and October) to portray the political situation surrounding the Bolshevik Revolution.
He also believed that intellectual montage expresses how everyday thought processes happen. In this sense, the montage will in fact form thoughts in the minds of the viewer, and is therefore a powerful tool for propaganda.
Intellectual montage follows in the tradition of the ideological Russian Proletcult Theatre which was a tool of political agitation. In his film Strike, Eisenstein includes a sequence with cross-cut editing between the slaughter of a bull and police attacking workers. He thereby creates a film metaphor: assaulted workers = slaughtered bull. The effect that he wished to produce was not simply to show images of people's lives in the film but more importantly to shock the viewer into understanding the reality of their own lives. Therefore, there is a revolutionary thrust to this kind of film making.
Eisenstein discussed how a perfect example of his theory is found in his film October, which contains a sequence where the concept of "God" is connected to class structure, and various images that contain overtones of political authority and divinity are edited together in descending order of impressiveness so that the notion of God eventually becomes associated with a block of wood. He believed that this sequence caused the minds of the viewer to automatically reject all political class structures.
Counter theories 
The editing of motion pictures has been a focus for various theories of cinematic realism, where editing is usually rejected as manipulative and propagandistic. In place of editing, critics such as André Bazin have argued in favor of the long take where the action plays out without continuity editing or the manipulations of Soviet montage.
See also 
- Eisenstein, Sergei; Jay Leyda (translator) (1942). The Film Sense. Harcourt Brace and Company. ISBN 0-15-630935-1. OCLC 01289114.
- Eisenstein, Sergei; Jay Leyda (translator) (1949). Film Form. Harcourt Brace and Company. ISBN 0-15-630920-3.
- Smith, Greg M. (2004). "Moving Explosions: Metaphors of Emotion in Sergei Eisenstein's Writings". Quarterly Review of Film and Video 21 (4): 303–315. doi:10.1080/10509200490446196. Retrieved 2006-12-28.
- "Eisenstein's Montage", Humanities Advanced Technology and Information Institute, University of Glasgow.
- "Classical Montage Sequence and Soviet Montage", the Telecommunication and Film Department, the University of Alabama.[dead link]
- Tomi Huttunen: Montage Culture Dept. of Slavonic and Baltic languages and literatures, University of Helsinki