![EU foreign policy chief Federica Mogherini, Iranian Foreign Minister Mohammad Javad Zarif, British Foreign Secretary Philip Hammond, and U.S. Secretary of State John Kerry, Vienna, Austria, July 14, 2015 (AP/Pool photo by Carlos Barria).](https://www.worldpoliticsreview.com/wp-content/uploads/2015/12/l_2015_trends_12302015_1.jpg?w=519&h=259&crop=1)
In this week’s Trend Lines podcast, WPR’s Editor-in-Chief Judah Grunstein and host Peter Dörrie discuss the major trends that shaped 2015, a year marked by the re-emergence of borders and national approaches to transnational problems. Listen: Download: MP3Subscribe: iTunes | RSS Trend Lines is produced, edited and hosted by Peter Dörrie, a freelance journalist and analyst focussing on security and resource politics in Africa. He can be followed on Twitter at @peterdoerrie.