Stephen Jay Gould

"The diversity of life is not explained by the diversity of environments alone."

"Extinction is not failure but the common fate of all species."

"To see the patterns in nature, we must learn to look backward through time."

"The fossil record is a chronicle of missed meetings and failed innovations."

"Evolution proceeds by differential survival, not by the design of a creator."

"Hope lies not in returning to a golden age but in recognizing the possibilities ahead."

"The great strength of natural selection is its simplicity and its universal applicability."

"Species boundaries are human constructs, but speciation is a natural process."

"To be human is to be aware of our own mortality and our place in deep time."

"The more we learn about other species, the more we understand ourselves."

"Evolution by natural selection is not random; the filter of selection is nonrandom."

"We are made of star stuff, connected to the universe in the most intimate way."

"The history of life teaches us that change is constant and adaptation is never final."

"Progress is not inherent in nature; it is an invention of human culture."

"Every species is equally evolved from its ancestral forms, just in different directions."

"The randomness of mutation and the nonrandomness of selection create the appearance of design."

"To accept evolution is to accept our kinship with all living things."

"Gould's view held that macroevolution cannot be simply extrapolated from microevolution."

"The presence of vestigial structures is powerful evidence for the common descent of species."

"We must distinguish between the fact of evolution and the theories that explain it."

"Science works best when it remains humble about what it cannot yet explain."

"The history of life on Earth is a story of diversification, not linear progress."

"Complexity arises not from design but from the accumulation of small changes over vast time."

"We are the only known species capable of understanding our own evolutionary history."

"The extinction of the dinosaurs was an accident, not an inevitability."

"Evolution explains life's diversity but not the origin of life itself."

"To truly understand the world, we must think in deep time."

"The beauty of nature lies partly in its utter indifference to human concerns."

"Homo sapiens is a recent and contingent product of evolution, not its ultimate goal."

"The theory of evolution is not about progress but about adaptation to environment."