Welcome to LessWrong!

The road to wisdom?
-- Well, it’s plain
and simple to express:
and err
and err again
but less
and less
and less.

- Piet Hein

Hence the name LessWrong. We might never attain perfect understanding of the world, but we can at least strive to become less and less wrong each day.

We are a community dedicated to improving our reasoning and decision-making. We seek to hold true beliefs and to be effective at accomplishing our goals. More generally, we work to develop and practice the art of human rationality.[1]

To that end, LessWrong is a place to 1) develop and train rationality, and 2) apply one’s rationality to real-world problems.

LessWrong serves these purposes with its library of rationality writings, community discussion forum, open questions research platform, and community page for in-person events.

To get a feel for what LessWrong is about, check out our Concepts page, or view this selection of LessWrong posts which might appeal to you:

Check out this footnote[2] below the fold for samples of posts about AI, science, philosophy, history, communication, culture, self-care, and more.

If LessWrong seems like a place for you, we encourage you to become familiar with LessWrong’s philosophical foundations. Our core readings can be be found on the Library page.

We especially recommend:

Find more details about these texts in this footnote[3]

For further getting started info, we direct you to LessWrong’s FAQ. Lastly, we suggest you create an account so you can vote, comment, save your reading progress, get tailored recommendations, and subscribe to our latest and best posts. Once you’ve done so, please say hello on our latest welcome thread!

LessWrong FAQ

A Brief History of LessWrong


LessWrong Concepts

  1. ^

    Rationality is a term which can have different meanings to different people. On LessWrong, we mean something like the following:

    • Rationality is thinking in ways which systematically arrive at truth.

    • Rationality is thinking in ways which cause you to systematically achieve your goals.

    • Rationality is trying to do better on purpose.

    • Rationality is reasoning well even in the face of massive uncertainty.

    • Rationality is making good decisions even when it’s hard.

    • Rationality is being self-aware, understanding how your own mind works, and applying this knowledge to thinking better.

  2. ^

    More sample posts from LessWrong:

  3. ^

    More details about our core readings:

    Rationality: A-Z is a deep exploration of how human minds can come to understand the world they exist in—and all the reasons they so commonly fail to do. The comprehensive work: