Spencer Greenberg, host of the Clearer Thinking podcast, appeared on July 15, 2026, to discuss the science behind self-improvement and mental autonomy. Greenberg and his co-author Jeremy Stevenson analyzed hundreds of advice books to create The 12 Levers: The Complete Psychological Toolkit for Improving Your Life, which distills the most evidence-based psychological techniques into a dozen actionable methods for personal growth.

During the conversation with Nick Gillespie, Greenberg highlighted how Cognitive Behavioral Therapy (CBT) and Rational Emotive Behavior Therapy (REBT) utilize critical thinking to help individuals better understand and manage their thoughts and emotions. This understanding, he argues, is fundamental to achieving real autonomy over one’s mind.

The discussion also touched on the broader implications of self-improvement practices, including whether there is a political dimension to these techniques. The toolkit aims to provide practical levers for anyone seeking to improve their mental clarity and emotional regulation.

The event and discussion took place in the United States and reflect a libertarian perspective on personal autonomy and self-directed change.

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