"In fact, abortion could be called a fundamental aspect of human behavior."
just because it was practiced in the past doesn't make it a "fundamental aspect of human behavior". homicide has been practiced since the beginning of time does that make it fundamental?!
Rome had the coliseum also, so under your mindset lets throw people into dens of lions and call it fundamental!
and your dissertation on infantucide (correctly spelled infanticide!!!) is based on incorrect allegations and false facts. Infanticide was not practiced near to the degree that this makes it SEEM to be. This is real propaganda at work!!!!
(Oh yeah... and behaviour is spelled behavior)