Whoah, fallacy barrage.
Actually, they can be tested just like any other hypotheses. There are many examples of species changing behavior and even progenys' physical attributes in response to social stimuli. One of the best known is the change in locusts from sedentary individuals to mass migrating clouds.
Poor analogy.
Infanticide and war/executions were the two main means of birth control throughout history. Birth control is one of those "socio-evolutionary" practices that has deep roots in "survival." You can starve and die or you can kill some or all of your kids - or kill your neighbors and take their stuff. The use of infanticide among the Innuit, for example, is well documented. Scarcity in tribal societies almost always led to organized total war - and the evidence of "genocide" is deep in the paleo-archeological record across all societies.
http://en.wikipedia.org/wiki/InfanticideRed herring. The topic is family planning.
Here's this might help you get back on topic:
http://www.uic.edu/classes/osci/osci590/13_2%20Birth%20Control%20in%20Antiquity.htmAnd this would explain why I didn't call them medieval morals, I called them Victorian morals, so straw man.
Which "significant" cultures are those? I can't think of any.
Argument from ignorance.
Just off the top of my head, the Five Nations have been thoroughly trashed by US history, so I doubt you'd consider them significant (and any qualified historian would strongly disagree), so how about Rome?
http://www.womenintheancientworld.com/legal%20status%20of%20women%20in%20ancient%20rome.htmAnd here is some basic information about the historic links between sex and religion:
http://en.wikipedia.org/wiki/Temple_prostitutesRearing kids imposes huge costs and task specialization is required to ensure survival.
Argument by assertion, and one which clearly holds no water in our society at that.
Everyone likes to talk about relaxed views about sex until a 300 lb jealous husband is sitting on you doing the ground and pound. Or you get a disease. Or feelings get hurt. Or a jealous wife expels another woman from the group or a "homebreaker" does the reverse - causing great discord. Or the kids get hurt.
Red herring again. I offered no argument about current Western culture's attitudes towards sex.
Red herring. Research on how modern societies organize themselves tells us nothing of past societies, especially given the significant amount of homogeneity in the modern world.