A sequence is a series of multiple posts on Less Wrong on the same topic, to coherently and fully explore a particular thesis.
Reading through sequences is the most systematic way to approach the Less Wrong archives.
Long sequences that have been completed and organized into a guide.
Sequence Guide: 37 Ways That Words Can Be Wrong
A series on the use and abuse of words; why you often can't define a word any way you like; how human brains seem to process definitions. First introduces the Mind Projection Fallacy and the concept of how an algorithm feels from inside, which makes it a basic intro to key elements of the LW zeitgeist.
By Eliezer Yudkowsky, spanning 1 Feb 2008 to 6 Mar 2008.
Sequence Guide: Evolution on the wiki.
Learning the very basic math of evolutionary biology costs relatively little if you understand algebra, but gives you a surprisingly different perspective from what you'll find in strictly nonmathematical texts.
By Eliezer Yudkowsky, spanning 2 Nov 2007 to 19 Nov 2007.
Sequence Guide: The Quantum Physics Sequence
A non-mysterious introduction to quantum mechanics, intended to be accessible to anyone who can grok algebra and complex numbers. Cleaning up the old confusion about QM is used to introduce basic issues in rationality (such as the technical version of Occam's Razor), epistemology, reductionism, naturalism, and philosophy of science. Not dispensable reading, even though the exact reasons for the digression are hard to explain in advance of reading.
By Eliezer Yudkowsky, spanning 9 Apr 2008 to 11 Jun 2008.
Sequence Guide: The Metaethics Sequence on the wiki.
What words like "right" and "should" mean; how to integrate moral concepts into a naturalistic universe.
The dependencies on this sequence may not be fully organized, and the post list does not have summaries.
By Eliezer Yudkowsky, spanning 20 Jun 2008 to 22 Aug 2008, with a good deal of related material before and after.
Sequence Guide: The Fun Theory Sequence
A concrete theory of transhuman values. How much fun is there in the universe; will we ever run out of fun; are we having fun yet; could we be having more fun. Part of the complexity of value thesis. Also forms part of the fully general answer to religious theodicy.
By Eliezer Yudkowsky, spanning 17 Dec 2008 to 25 Jan 2009.
Sequence Guide: The Craft and the Community
The final sequence of Eliezer Yudkowsky's two-year-long string of daily posts to Less Wrong, on improving the art of rationality and building communities of rationalists.
By Eliezer Yudkowsky, spanning 12 Mar 2009 to 26 Apr 2009.