New York City Mayor Michael Bloomberg told college graduates that success in life requires courage, curiosity and hard work.
Bloomberg addressed Saturday's commencement at Kenyon College northeast of Columbus.
Bloomberg encouraged the 410 graduates to "have the courage to think for yourself and to believe in your idea."
He said lack of courage lies at the heart of political problems.
Bloomberg, who has backed stronger federal gun control laws, highlighted recent gun violence and said the inability to enact tougher gun laws reflected a lack of courage.
The three-term mayor worked on Wall Street and founded the Bloomberg financial news and information service before he was elected.