liggio was a visiting professor of law at the francisco marroquin university in guatemala city, at the academia istropolitana in bratislava (slovakia), at the institute for political and economic studies (georgetown university) and at the university of aix-en-provence, france. he was executive director of the john templeton foundation freedom project at the atlas network, where he led the international freedom project from 1998 to 2003. liggio is a distinguished senior scholar with the institute for humane studies, where he served as director of programs in history and social theory from 1974 to 1977, as executive vice-president from 1979 to 1980 and then as president from 1980 to 1989. liggio served the humane studies foundation as chairman from 1980 to 1994 and then as vice-chairman from 1994 to 1998.