A timely, deeply personal biography of a Jewish leader whose questions for Israel have come back to haunt us with a vengeance. Born in what is now Lviv, Ukraine, in 1869, Marcus Ehrenpreis was the secretary of Theodor Herzl at the First Zionist Congress in Basel in 1897, a grand rabbi of Bulgaria during two Balkan wars, a diplomat in defense of Europe's minorities, a Swedish author compared to Joseph Conrad, the chief rabbi of one of...