Adam Smith was a Scottish economist and philosopher who was a pioneer in the field of political economy and key figure during the Scottish Enlightenment.

Niccolò di Bernardo dei Machiavelli was a Florentine diplomat, author, philosopher, and historian who lived during the Italian Renaissance.

William James Durant was an American historian and philosopher, best known for his eleven-volume work, The Story of Civilization, which contains and details the history of Eastern and Western civilizations.

Jay Abraham is an American business executive, conference speaker, and author.

Henry Stuart Hazlitt was an American journalist, economist, and philosopher known for his advocacy of free markets and classical liberal principles.

Glennon Doyle is an American author and queer activist known for her books Untamed, Love Warrior, We Can Do Hard Things and Carry On, Warrior.