Answer: Lech Walesa
Explanation: The Solidarity Union, whose Lech Wales co-founder, was the first independent trade union in the Eastern Bloc. Lech Walesa was responsible for the transition period in which he transformed communism into some form of post communist arrangement in order to gradually translate into the conditions of a market economy. Wales was Poland's president from 1990 to 1995, as the first Polish president after the fall of communism.