"History is driven by people. People are programmed by biology (nature) as much as they are free actors - we all have a fairly universal set of wants and needs that we seek to satisfy. Starving Parisians will rise up against Louis XVI just as starving ancient Egyptians will rise up against a Pharaoh. Romans will refuse to fight in unpopular wars, just as Americans refused to fight in Vietnam. I am also shocked to find that this kind of analysis is considered cringeworthy by academia."
The human nature that people have to eat was obviously not the kind of human nature that the above poster was speaking of. If it was I concede hungry people do get cranky. Biology without a doubt guides the human experience, but is History really the study of whether human beings need to eat, sleep and crap?
"It is interesting to me that you point to the medieval period, as I think that was a time where human nature played an even *greater* part in determining the course of history than in times where great nation-states have broad powers to enforce unnatural conformities on its subjects."
And what is this Human nature that drove this period? How is that human nature seen today, after all it is human nature and remains unchanged desspite changes in time and place.
"All of those things you mention are human nature. The modes of expression have changed, but there is not much difference between 21st Century me, working hard to support a family, believing in my own religion, loving my wife, wanting the government to leave me the hell alone, and any other man who does those same things, in any time or place."
Men in the other time and place you speak of did not marry for love, nor did they necessarily love there wives, marriage was an alliance, pure and simple. If it is human nature to love your wife (as it seems you think it is) why would marriage in the medieval period be decided purely by economic considerations? So does a man really do the same in all time and places?
"And what barrier is there to my understanding the story of Abelard and Heloise, the tragic medieval love story, from the 12th Century! So many years ago, but because I am human, and they are human, I can imagine and relate to them."
Couldn't it also be that the story of Abelard and Heloise were instrumental in helping to form your conceptions of love?