My friend Tom McCabe has uploaded several essays and papers that may interest Accelerating Future readers:

Failure and Success in AGI Projects
Optimization of Rockets with Variable Exhaust Velocity
Singularity FAQ, with Kaj Sotala
Sales in Startups
How Gold and Glory Led the Roman Republic to Greatness
A Unified Theory of Success
An Alternative Theory of Startups

There is also a short essay by Michael Vassar:

Changes in Class Well-Being Over the Past Century