Below are the 8 scanned pages of the article Thought Contagion as Abstract Evolution, by Aaron Lynch. Originally published in Journal of Ideas, vol. 2 #1, January, 1991. These 8 gif files average more than 50 k bytes for a total of 419 k bytes.

A somewhat revised and re-titled html version of this paper is also online as Units, Events, and Dynamics of Meme Replication, and a more comprehensive 1998 paper Units, Events, and Dynamics in Memetic Evolution is also available. The scanned 1991 paper is made available for reference purposes.