Who said "Human nature if it is to survive must become more varied."?

This quote is attributed to Gertrude Stein.

Human nature if it is to survive must become more varied. - Gertrude Stein

"Human nature if it is to survive must become more varied."

Gertrude Stein Change

Novelist Poet American 1874–1946

"A rose is a rose is a rose."

"There is no there there."

"Everybody gets so much information all day long that they lose their common sense."

"You are all a lost generation."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."