Here’s a list of blogs that I enjoy written by friends. This doesn’t include blogs by people I haven’t met (eg. Marginal Revolution), or anonymous blogs. Of course, the topics and posting frequency vary a lot, so the categories are rough.

Hard science, physics, biology, etc.:

Andart, Anders Sandberg
Semantic Scribblings, Chelsea Voss
Eukaryote Writes Blog, Georgia Ray
ForeXiv, Jess Riedel
AI Impacts, Katja Grace
AI Alignment, Paul Christiano
Otium, Sarah Constantin
Parenting With Evidence, Sarah Constantin
Shtetl Optimized, Scott Aaronson
Geroscience, Tegan McCaslin
Deep Safety, Victoria Krakovna

Soft science, economics, sociology, etc.:

Reflective Disquilibrium, Carl Shulman
Overcoming Bias, Robin Hanson
Slate Star Codex, Scott Alexander
Optimize Everything, Spencer Greenberg
Don’t Worry About the Vase, Zvi Mowshowitz

Politics and morality:

Pedestrian Observations, Alon Levy
Almost No One is Evil, Almost Everything is Broken, Jai Dhyani
Concept Space Cartography, Jim Babcock
Giving Gladly, Julia Wise
The Unit of Caring, Kelsey Piper
The Consequentialist, Matthew Gentzel
Nothing is Mere, Rob Bensinger
Fire and Pulse, Roxanne Heston

General thoughts and philosophy:

Compass Rose, Ben Hoffman
Teal Tensor, Elizabeth Morningstar
Aceso Under Glass, Elizabeth van Nostrand
Unstable Ontology, Jessica Taylor
Meteuphoric, Katja Grace
Minding Our Way, Nate Soares
Minds Aren’t Magic, Paul Crowley
Saner Than Lasagna, Sam Rosen and Eloise Rosen
Apophany, Tegan McCaslin
Becoming Eden, Will Eden and Divia Eden

Personal:

Ben Kuhn
Buck Shlegeris
Eliezer Yudkowsky
Holly Elmore
Jeff Kaufman
Luke Muehlhauser
Malcolm Ocean
Nancy Hua
Paul Christiano
Satvik Beri