“The Age of Mercury” is a story about the difficult journey full of incredible hardships, tragedies, and great feats undertaken by representatives of the Jewish people in the 20th century—from shtetls to giant megacities, from the Pale of Settlement to world capitals. Yuri Slezkin not only studies individual lives filled with dramatic events, but also points to common trends and prerequisites of the social and political tectonic shifts of the 20th century—shifts in which representatives of the “mercurian” nation, the nomadic people, were invariably at the center. This is a nation accustomed on the one hand to adapting to existing realities, and on the other to fiercely protecting its religious, social, and cultural values. One of the most captivating, profound, and large-scale works on the history of the Jewish people in the 20th century—the people who, in fact, created this century and suffered from it more than anyone else.