Events
Conjecture Institute hosts events that bring together critical rationalists and curious minds from around the world.
Upcoming Events
Conjecture Con 2026
September 25–27, 2026 · Philadelphia
Our flagship annual conference bringing together science and philosophy enthusiasts from around the world.
Conjecture Institute Conference: Defend the West
January 13, 2027 · Online
An online conference on the ideas that built the modern West — reason, free inquiry, individual rights and open markets — and what it takes to defend them.
Past Events
Conjecture Institute Conference: Advances in Physics
June 17, 2026 · Online
An online conference hosted by Conjecture Institute that brought together physicists and philosophers of physics working at the foundations of the field. All thirteen talks are now available to watch on YouTube.
Conjecture Con Europe 2026
Spring 2026 · Oxford, UK
Friends of Conjecture Institute have organized the first European edition of Conjecture Con, hosted in an intimate setting.
Rat Fest 2025
Fall 2025 · Philadelphia
Our fourth annual ideas festival, attended by over 75 people from all over the world. Attendees raved about the special opportunity to meet in-person and build relationships with enthusiasts who are otherwise scattered across the globe.
