Then who are all the people talking about human nature from the perspective of the Right? E.g. in the debate about trans people, or feminism etc.
Lots of people now, although to give credit where it's due many of the issues which have become main-stream today were broached on early "Alt-Right" discussion boards and blogs because they were willing to go out and slaughter sacred cows.
There is an emerging new right consensus which has been called alternatively the populist right, new nationalism, national conservatism, and probably other descriptors that I can't think of at the moment. While the way of thinking and framing issues is most definitely NOT taken from the Alt-Right, some of the issues that the Alt-Right first picked up on were genuine problems and are being addressed. Issues such as 3rd world immigration, media cultural hegemony, the destruction of the nuclear family, the muddling of sexuality and sexual identity, etc etc. Whether this new consensus will continue post Trump is unknown. While he's by no means an intellectual driver he has been a rallying point similar to Ron Paul's presidential run for libertarians.
Its largely in this sense that the Alt-Right shows its inheritance from the Pat Buchanan paleo-cons like Paul Gottfried too - but nobody was listening to them and there were few of them about being... well... old and stodgy, prior to the youthful irreverence of the early Alt-Right. Also the religious right of the 80s cared about this stuff, but everyone was sick of their shit and they blew it. The Alt-Right, when it first popped up, had energy and drive and was willing to "go there".
The drivers of culture are almost always on the distribution tails. Ideas get sorted and refined and some of them get adopted by the mainstream. Some of them, for better or worse, get banished to the badlands.