Topic
Digital Cash
Hal Finney wrote about private electronic cash in Issue #10. Wei Dai and Nick Szabo were active voices on digital money on the mailing list.
People
Ideas
Topics
These are some of the topics the Extropians were discussing and exploring in the 1980s and 1990s. Some were already emerging. Others were still decades away from entering the mainstream.
Topic
Artificial Intelligence
The Extropians debated machine intelligence, intelligence explosions, and AI alignment throughout the 1990s. Eliezer Yudkowsky joined the mailing list at 17 and developed what the field now calls AI alignment.
Topic
Prediction Markets
Robin Hanson invented Idea Futures - the idea that letting people bet on whether something is true makes the price the odds.
People
Topic
Cryonics and Life Extension
Members believed aging and death were problems to solve. FM-2030 and Hal Finney are both cryopreserved at Alcor.
Topic
Nanotechnology
Eric Drexler's molecular manufacturing ideas were central to the journal. J. Storrs Hall wrote about Utility Fog. Ralph Merkle explored nanotech as a path to uploading and life extension.
People
Topic
Mind Uploading
Hans Moravec's Pigs in Cyberspace (Issue #10) described minds transferring into computational substrates. Ralph Merkle gave the technical roadmap in Issue #11.
Topic
Space and New Frontiers
Nick Szabo framed space as real estate for new societies. The community debated Mars colonization and most wanted to go now. Bill Eichman explored seasteading.
People
Topic
Sovereignty and Spontaneous Order
Tom Morrow wrote about competing private legal systems. The community explored voluntary opt-in governance, charter cities, and new societal models.
People
Topic
The Singularity
In 1993 Vernor Vinge predicted machine intelligence could make the future unpredictable. The Extropians debated this seriously - fast vs. gradual progress, intelligence explosions, and what comes after.
Topic
Robots
The Extropians explored robotics, autonomous systems, and the convergence of machines with intelligence and mobility.
People
Topic
Memetics and Ideas
The Extropians were fascinated by how ideas spread and evolve, treating memes as the cultural equivalent of genes.
People