How about letting some other countries try it for a few decades and seeing if it works there. Wouldn't that be a good test? Well, Canada, Israel, Germany, France, UK, Australia, New Zealand and several other of the developed countries have all done it with no negative impact. None of the things being harped about women not being emotionally capable, men endangering themselves to protect them, al Qaeda kidnapping them, etc., none of that has come to pass over the decade and more that these countries have had their women in combat in Afghanistan and elsewhere. So that's actual evidence.