One of the great lectures of American freethinker Robert Green Ingersoll.
 
"As you turn these pages, you will encounter not just the wisdom of a great thinker but a roadmap for liberation from the chains of dogma. Ingersoll reminds us that heresy, far from being a sin, is a vital force for innovation and freedom. It is the heretics who light the way for humanity to march forward, undaunted by the dark forces of ignorance and oppression."
 
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Spring of Reason and Exuberance: Rationalist International Cruise Conference.  https://www.rationalists.net/event-details-registration/spring-of-reason-and-exuberance-2025
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Project Freethought: One of the biggest ventures in the history of Freethought and Rationalism. https://www.rationalists.net/projectfreethought