Here are the links to a recent four part lecture series I gave at Boca Raton Synagogue that looks at the massive shifts that occur in Eastern European Jewish society over the course of the 19th century:

The Winds of Change:

Part 1: Setting the Scene

Part 2: Rav Yisrael Salanter and the Mussar Movement

Part 3: Haskalah and the Rise of Secular Judaism

Part 4: The Birth of Modern Zionism and the Religious Reaction