David Koch

The late businessman and philanthropist, along with his brother Charles, became synonymous with libertarian-influenced political activism. Their funding of various libertarian causes and think tanks has had a significant impact on American politics, though their focus on economic issues over social ones places David somewhat lower on the social freedom axis. The Koch brothers’ financial support for libertarian institutions has been crucial in developing and promoting libertarian ideas in policy circles, even as it has made them controversial figures in American politics.