I encountered 'humanity which ~' or 'human race which ~' a few times.
humanity and human race both refer to humans, but why do you use which? And how about 'humanity who' or 'human race who'?
By analogy, it seems to me unnatural and unhealthy for a nation to be engaged in global crusades for some ostensible principle or ideal while neglecting the needs of its own people; indeed, it seems far more likely that the nation that does most to benefit humanity in the long run is the nation that begins by meeting the needs of that portion of humanity which resides within its own frontiers.
-- J. W. Fulbright: What Kind of Country Do You Want To Be In?