Publisher's Synopsis
Wright's shifting-balance theory of evolution, first conceived in 1925, has proved enormously useful in modern evolutionary biology. Wright's international prestige has never been higher than it is currently, and the time is ripe for a rereading of his seminal papers. These papers are not only historically important for understanding the period of the "evolutionary synthesis" of the 1930s and 1940s, but continue to be stimulating and useful to working evolutionary biologists today.