Jonathan David Haidt is an American social psychologist and author.

Robert Greene is an American author of books on strategy, power, and seduction.

Paul Kleinman was born in New York City, New York, and grew up in White Plains, New York. He graduated from the University of Wisconsin in 2009 with degrees in Art and Communication Arts: Radio, Television and Film. He is the author of works including *Philosophy 101: From Plato and Socrates to Ethics and Metaphysics, an Essential Primer on the History of Thought*.

Raymond H. Wheeler was a Professor of Psychology at the University of Kansas from 1925 to 1947. He was known for his research on Gestalt psychology and climatology's relationship to human behavior and civilizations. His publications include The Laws of Human Nature and Principles of Mental Development, co-authored with F.T. Perkins. Dr. Wheeler died in 1961.

Tobias M. Kohl is the author of *The Unowed Universe: A 21st-Century Philosophy Grounded in Science* (published in English and in German as *Das Ungeschuldete Universum*). His work develops a philosophy for the 21st century grounded in science, drawing on tools such as Einstein's proper time, modal logic, and thermodynamics.

James Madison, the pen name of Charles Aronstein (August 27, 1870 – March 27, 1943), was an American theatre manager, writer, and publisher, best known for writing and publishing the periodical *Madison's Budget*.