Below is a list of some of my favourite online writers, sorted loosely by category. A star ✶ represents a particularly strong recommendation.
Rationality and AI
Gwern ✶
Biology and climate
Economics
Tyler Cowen and Alex Tabarrok ✶
Mathematics and statistics
Philosophy
History
Asia
Dan Wang ✶
Urbanism and cities
Humour and romance
XKCD ✶
Entrepreneurship
Irish
Sam Enright 