 As many commentators have pointed out, the theory of punctuated equilibrium of Niles Eldredge and Stephen Jay Gould (1992) raises the question of evolution versus revolution, now precisely in the biological (paleontological) context. In fact, Gould and Eldredge were themselves influenced by Kuhn, whom Gould once described as “a dear friend”; but they denied that they had deliberately fashioned themselves as Kuhnian revolutionaries (Gould 1997). Gould and Eldredge end their later review article on punctuated equilibrium by remarking: