History, English, Philosophy, Communication, Anthropology, Archaeology, Art, Linguistics, Political Sciences...
The cultural/gender studies I tend to lump in as subsets of those major subjects. I used to laugh at them coming from a Sciences background only to find that any advancement I could make filled me with doubt that the world was ready to use it responsibly.
These fields are critical. We have no chance of being able to really breakthrough our major problems as a species without being able to understand what it means to be human, or even what the same damn mundane things look like from another culture or person's point of view.
Trying to hand off something so portentous as something like halfway successful ubiquitous facial recognition to a society so poor in the humanities as our society today is like letting an infant learn to walk in a minefield. If we can't even coexist with the people around us without trying to strip everyone of civil rights, or getting into pissing matches about borders, we've got a long way to go before we start messing around with massively disruptive technologies with high social impacts. The recent social media fiascos and trends toward weaponized disinformation causing panic and hysteria should be evidence enough that we as people need to pull back and shore up the basics so we can at least ATTEMPT to try to reconcile the new avenues of life opened up by global interconnectivity of data and logistics with some of our more basic fears and prejudices to which we are ALL still subject.
For heaven sake, with enough attention to detail, and a convincing enough Facebook profile, you can influence the sentiments of MASSES of people. It doesn't matter whether truth or lies... It gets said all the same. During Lincoln's time as President, he said something very poignant during the lead up to the Gettysburg address when he was staying at the Wills House, composing the Gettysburg Address.
>"In my position, it is important that I should not say foolish things...[If you can help it! Is exclaimed from the audience]...It very often happens the only way to help it is to say nothing at all!"
Imagine the horror he would experience to find out that we as a people have devised a technology that forces EVERYONE, not just one in a position of power to have to express the same torturous care in crafting our communications lest our "foolishthings" exact a cost through bloodshed or imprisonment?
None of that can be done without good communication, understanding, and empathy for your fellow man. We all don't have to agree, and war will always happen, but Goddamnit, we should be able to formulate a better excuse than "It's the war on <insert nebulous concept here>". That can only be done with a thorough understanding of the ways we communicate as people, cultures, artisans, polities, etc.
And EVERYONE has a duty to know this stuff, or at least be aware enough of it to keep themselves safe from those who would use it against them.
It isn't easy, but it is the only way.