1 Jan 1932 Jahr - Wright proposes the shifting balance theory

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In 1932, Wright's shifting balance theory proposed the idea that if gene's were transferred between species, those genes could be spread to the rest of the species, along with genetic drift, and its effect on the theory, being written as the first phase of the shifting balance theory. This theory is in some cases regarded as an important part of the modern theory of evolution, however it does have some controversy behind it and some scientists debate pieces of the theory, such as the different phases listed by Wright in the theory. However, when the theory was proposed it was a completely new idea, and for the time in which it was proposed, fairly accurate.

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