Antony Flew's conversion from atheism due to biological complexity

Antony Flew was the most prominent atheist philosopher of the 20th century, who debated and argued for atheism for decades. In his later years (in his 70s), he reconsidered and concluded that God exists — primarily because of the biological complexity discovered in the 20th century (DNA, molecular machines) that Darwin could not have anticipated. Flew became a theist (specifically a deist in the Aristotelian tradition) but did not become a Christian. His case demonstrates the persuasive power of the biological design argument.