Do people stop being creative as they reach middle age? Henry Ford introduced the Model T when he was 45. Sam Walton built Walmart in his mid-40s.

Some of the most creative people of the century were also not young. Ray Kurzweil published The Singularity Is Near in his 50s; Alfred Hitchcock directed Vertigo when he was 59; Frank Lloyd Wright built his architectural masterpiece, Fallingwater, when he was 68. And let’s not forget the greatest innovator of recent times: Steve Jobs. His most significant innovations — iMac, iTunes, iPod, iPhone, and iPad — came after he was 45. […]