"It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change."

This quote is often attributed to Charles Darwin, though there is no evidence he ever said it.

Clarence Darrow is known for being a famous defense attorney, but he is not known to have said this quote either.

It's likely that the quote evolved over time and its origin remains uncertain. It's important to be careful about attributing quotes to specific people without reliable sources.