Complex sentence: He played a significant role in the peaceful transition from communism to capitalism in Eastern Europe in the late 1980s and early 1990s, and provided one of Europe's largest higher education endowments to the Central European University in Budapest.
Split into simpler sentences: He played a significant role in the peaceful transition from communism. To capitalism in Eastern Europe in the late 1980s and early 1990s, and provided one of Europe's largest higher education endowments to the Central European University in Budapest.