Dath Ilan is a fictional world and civilization invented by Eliezer Yudkowsky. It is a parallel reality of earth where society is much better at coordination and various good policies have been implemented, though technology is only as advanced as earth's, if not slightly less. It can be thought as a more practical and realistic form of Economist's Paradise. Eliezer first introduced it in his April Fool's day post 'My April Fools Day Confession', where he claimed that he was an average person from that world and none of his ideas were original.

This world was further fleshed out (and some its backstory changed) in a later April Fool's post:

I'm from a parallel Earth with much higher coordination: AMA

And in a series of glowfics featuring dath ilani characters:

a dath ilani matchmaker in King Randale's court (incomplete)
but hurting people is wrong (complete)
mad investor chaos and the woman of asmodeus (ongoing as of Apr 2022)
a dath ilani EMT in queen abrogail's court (ongoing as of Apr 2022)

Some known features of dath ilan:

Not tagged due to spoilers:

Lies Told To Children

External Posts:

Until we Build dath ilan