ROCKPORT ( AP) — The founder of the Maine-based Institute for Global Ethics has died in Florida. Rushworth Kidder was 67.

The institute said Kidder died Monday of natural causes in Naples, Fla., where he moved late last year. He is survived by his wife, Anne Elizabeth Davidson Kidder, and two daughters.

Kidder was a columnist at the Christian Science Monitor and wrote about ethics before founding the institute in 1990 in Camden. It later relocated to Rockport.

Kidder, who kept a home in Lincolnville, wrote many books including “Good Kids, Tough Choices: How Parents Can Help Their Children Do the Right Thing,” “ Moral Courage” and “ How Good People Make Tough Choices: Resolving the Dilemmas of Ethical Living.”

Born in Amherst, Mass., Kidder earned a doctorate from Columbia University in English and comparative literature.