Transitional forms are generally lacking at the species level, but they are abundant between larger groups.
Stephen Jay GouldIn their recently aborted struggle to inject Genesis literalism into science classrooms, fundamentalist groups followed their usual opportunistic strategy of arguing two contradictory sides of a question when a supposed rhetorical advantage could be extracted from each.
Stephen Jay GouldThe Darwinian revolution is about essence. The Darwinian revolution is about who we are, it's what we're made of, it's what our life means insofar as science can answer that question.
Stephen Jay GouldChange is more often a rapid transition between two stable states than a continuous transformation at slow and steady rates. . . .Change occurs in large leaps following a slow accumulation of stress that a system resists until it reaches the breaking point. Heat water, and it eventually boils. Oppress the workers more and more and bring on the revolution.
Stephen Jay Gould