Tikvah
Editors’ Pick

April 24, 2026

The Enduring Legacy of Mordecai Kaplan

Reconstructionist Judaism failed as a denomination—even as American Jews absorbed its ideas.

Numerically speaking, Reconstructionist Judaism—founded, almost reluctantly, by Mordecai Kaplan—has been far less successful than the other three American denominations. Yet Kaplan’s theories, laid out in his 1934 magnum opus Judaism as a Civilization, in many ways speak more broadly to the ideas held by American Jews than do the formal theologies of Orthodox, Conservative, and Reform. Benjamin Weiner reviews Jenna Weissman Joselit’s new biography of this figure:

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