Watch: Robert Kagan discusses America and our imperiled world

Recent years have brought deeply disturbing developments around the globe. American sentiment seems to be leaning increasingly toward withdrawal in the face of such disarray. In his new book “The Jungle Grows Back: America and Our Imperiled World,” Robert Kagan elucidates the reasons why American withdrawal would be the worst possible response, based as it is on a fundamental and dangerous misreading of the world. Like a jungle that keeps growing back after being cut down, the world has always been full of dangerous actors who, left unchecked, possess the desire and ability to make things worse.