LessWrong (also written Less Wrong) is a community blog and forum focused on discussion of cognitive biases, philosophy, psychology, economics, rationality, and artificial intelligence, among other topics.

Purpose

LessWrong describes itself as an online forum and community aimed at improving human reasoning, rationality, and decision-making, with the goal of helping its users hold more accurate beliefs and achieve their personal objectives. The best known posts of LessWrong are "The Sequences", a series of essays which aim to describe how to avoid the typical failure modes of human reasoning with the goal of improving decision-making and the evaluation of evidence. One suggestion is the use of Bayes' theorem as a decision-making tool. There is also a focus on psychological barriers that prevent good decision-making, including fear conditioning and cognitive biases that have been studied by the psychologist Daniel Kahneman. LessWrong is also concerned with artificial intelligence, transhumanism, existential threats and the singularity. The New York Observer in 2019 noted that "Despite describing itself as a forum on 'the art of human rationality,' the New York Less Wrong group... is fixated on a branch of futurism that would seem more at home in a 3D multiplex than a graduate seminar: the dire existential threat—or, with any luck, utopian promise—known as the technological Singularity... Branding themselves as 'rationalists,' as the Less Wrong crew has done, makes it a lot harder to dismiss them as a 'doomsday cult'."

History

LessWrong developed from Overcoming Bias, an earlier group blog focused on human rationality, which began in November 2006, with artificial intelligence researcher 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. In 2013, a significant portion of the rationalist community shifted focus to Scott Alexander's Slate Star Codex.

Artificial Intelligence

Discussions of AI within LessWrong include AI alignment, AI safety, and machine consciousness. Articles posted on LessWrong about AI have been cited in the news media. LessWrong, and its surrounding movement work on AI are the subjects of the 2019 book The AI Does Not Hate You, written by former BuzzFeed science correspondent Tom Chivers.

Effective altruism

LessWrong played a significant role in the development of the effective altruism (EA) movement, and the two communities are closely intertwined. In a survey of LessWrong users in 2016, 664 out of 3,060 respondents, or 21.7%, identified as "effective altruists". A separate survey of effective altruists in 2014 revealed that 31% of respondents had first heard of EA through LessWrong, though that number had fallen to 8.2% by 2020.

Roko's basilisk

In July 2010, LessWrong contributor Roko posted a thought experiment to the site in which an otherwise benevolent future AI system tortures people who heard of the AI before it came into existence and failed to work tirelessly to bring it into existence, in order to incentivise said work. This idea came to be known as "Roko's basilisk", based on Roko's idea that merely hearing about the idea would give the hypothetical AI system an incentive to try such blackmail.

Neoreaction

The comment section of Overcoming Bias attracted prominent neoreactionaries such as Curtis Yarvin (pen name Mencius Moldbug), the founder of the neoreactionary movement, and Hanson posted his side of a debate versus Moldbug on futarchy. After LessWrong split from Overcoming Bias, it too attracted some individuals affiliated with neoreaction with discussions of eugenics and evolutionary psychology. However, Yudkowsky has strongly rejected neoreaction. Additionally, in a survey among LessWrong users in 2016, 28 out of 3060 respondents (0.92%) identified as "neoreactionary".

Notable users

LessWrong has been associated with several influential contributors. Founder Eliezer Yudkowsky established the platform to promote rationality and raise awareness about potential risks associated with artificial intelligence. Scott Alexander became one of the site's most popular writers before starting his own blog, Slate Star Codex, contributing discussions on AI safety and rationality. Further notable users on LessWrong include Paul Christiano, Wei Dai and Zvi Mowshowitz. A selection of posts by these and other contributors, selected through a community review process, were published as parts of the essay collections "A Map That Reflects the Territory" and "The Engines of Cognition".