Gleb is a historian of science working at the intersection of history, psychology, and cognitive neuroscience. He researches emotions, decision-making, meaning and purpose, agency and conformism, community, youth, social control, fun and leisure, and civic engagement in historical context. His publications have appeared in academic peer-reviewed journals and edited volumes in the United States, England, France, Germany, and Russia.

Gleb is one of the leaders of the team of academics who created the Pro-Truth Pledge, and also is the author of The Truth Seeker’s Handbook: A Science-Based Guide.