Well for starters, there is no singular mentality that's possessed by all men and women, we're all very different and none of us share 100% of the same mentality, we can have similar mentalities, but not exactly the same.
In the real sense of things there's alot that governs a person's mentality, from culture to upbringing to religion. People who share any of these three will probably have similar mentalities, but they won't be completely the same.
If there was one mentality that all of us share in common, it's that of self preservation, excluding people who actually want to die then all of us have the mentality that we have to do whatever we can to survive lest we perish.
Aside from the act of self preservation, I don't think there's any mentality that all Human beings share.
I hope this helps.