No matter what your politics, Yanis Varoufakis is one of the best minds and speakers to be involved in the story of Europe in the past few years. I urge anyone to watch any of his talks here
https://www.youtube.com/results?search_query=yanis+varoufaki... -- I especially liked
https://www.youtube.com/watch?v=zWB6lY2GBjQAs one of the introductions states: "Yanis Varoufakis considers himself a politician by necessity, not by choice."