Good news: we have a neat, universal milestone on the journey to mastery. What that looks like, and how to use it.

In countries with weak institutions, how things should work is often different from how things actually work. A reminder of what that feels like at the ground level.

Mentor relationships can be absolutely wonderful over the arc of a career. This is a simple way to think about finding and keeping good mentors.

How to hunt for useful expertise research, emotional regulation work, or better learning techniques, straight from the primary literature.

Cognitive Flexibility Theory: the caveats. Also: a look at kind vs wicked learning domains, and what this tells us about building expertise in messy, real world domains.

What happens if cases are more important than principles in your domain? Some non-obvious implications.

What Cognitive Flexibility Theory tells us about the acceleration of expertise in ill-structured domains.

Why bother learning history, when history isn't likely to repeat itself? We take a look at what Cognitive Flexibility Theory tells us about the best way to learn from other people's experiences.

Game analogies can be helpful when you're playing to win. But there's a limit to how useful they can be when thinking about life.

There's a saying commonly attributed to Charlie Munger that goes 'Take a Simple Idea and Take It Seriously'. Work out all the implications. Seek out all the case studies. Here's a story of two investors who did exactly that.