Internationally recognized for his scholarship on matters of warfare and force, Ohlin will address the legal and philosophical questions arising from 21st-century warfare when he visits campus this week. Mon, 19 Mar 2012 16:00:00 -0800 alumni,scholarship,events,21st-century warfare,jens ohlin,columbia university,cornell university law school,alumni,academics, Mon, 19 Mar 2012 16:00:00 -0800