Evolution affects humans too.

I present to you 5 facts.

1: Civilisation started after early homosapiens migrated from Africa into hostile ice age Europe.
2: Adaptions occur more frequently when an animal enters a new environment.
3: By far the most important adaption in recent human evolution is the brain. A neanderthal with a human brain would not be significantly worse or better off than a human.
4: Physical adaptions take longer to evolve than the simple increase in size of the neo-cortex.
5: Humans do have a plethora of physical adaptions to various environments.

>>21
If a meme is analogous to a gene then memes will never evolve. The species that carries the gene evolves. If the carriers (humans) are collectively the environment then what are the organisms & species?
You're right that chance of selection is directly related to fitness, but it must also be related to the memes: the meme itself must have a hand in its own chance to be reproduced.