"The immune system evolved to discriminate infectious nonself from noninfectious self" http://dx.doi.org/10.1016/0167-5699(92)90198-G http://dx.doi.org/10.1016/

"The immune system evolved to discriminate infectious nonself from noninfectious self" http://dx.doi.org/10.1016/0167-5699(92)90198-G http://dx.doi.org/10.1016/0167-5699(92)90198-G "We propose that humans have evolved to withstand energy crises by decreasing their body size" http://www.nature.com/pr/journal/v64/n1/abs/pr2008135a.html http://www.nature.com/pr/journal/v64/n1/abs/pr2008135a.html :humans evolved to modulate social behaviors like mating and parenting in response to specific environmental cues: http://link.springer.com/chapter/10.1007%2F978-1-4612-3760-0_9#page-1 http://link.springer.com/chapter/10.1007%2F978-1-4612-3760-0... After just few seconds of search.. So apparently some scientists didn't get the memo. Hopefully some day you will also evolve to be less nitpicky.