On a frigid February night in Kyiv in 2013, former president of Poland Aleksander Kwaśniewski turned to his friend Pat Cox, the former president of the European Parliament, and said: "Don't worry, Pat. They've got a lot of empty space on this square--an ideal location to put up statues of you and me." Over a year and a half, Kwaśniewski and Cox visited Ukraine 27 times, spending total of 80 days there negotiating the release of former Prime Minister Yulia Tymoshenko, which would allow Ukraine to sign the Association Agreement with the European Union. The Cox-Kwaśniewski mission...