The 92nd Street Y has digitized over 400 historical lectures from the last 75 years, which are now accessible for free on their website thanks to a grant from the National Endowment for the Humanities.

Mordecai Kaplan, a prominent figure in modern American Judaism, kept a journal from 1913 to 1981, offering insights into his evolving views and the challenges he faced in reconstructing Judaism for the modern world.