Less Wrong is a community resource devoted to refining the art of human rationality, sometimes known as rationalism. It has undergone a rise and arguably a fall in recent years.
LessWrong developed from Overcoming Bias, an earlier group blog focused on human rationality, which began in November 2006, with artificial intelligence theorist Eliezer Yudkowsky and economist Robin Hanson as the principal contributors.
In February 2009, Yudkowsky's posts were used as the seed material to create the community blog LessWrong, and Overcoming Bias became Hanson's personal blog.
The site's use of Reddit-style voting and materials lead to significant growth and interest over the following years.
At some point Eliezer Yudkowsky finished writing the sequences.
During this period, popular fan-fiction HPMOR was started and finished.
At some time around June through to October 2013 Eliezer stopped participating directly in the less wrong community, as did a number of other established contributors.
This triggered many contributors removing themselves to their own blogs and communities, triggering what's commonly known as the less wrong diaspora.
As of 2016 the community is far less vibrant than it once was. The forum's karmic barrier to entry stands, but submissions are down. The wiki has low traction and it is potentially in need to streamlining around remaining activity rather than its former glories.