It's appeared in varying degrees on all of Kanye's albums, but the moments of intense social commentary on Yeezus ("New Slaves," "Black Skinhead") stood head and shoulders above the rest of the music.
His ability to weave society's ills into his personal experiences is unparalleled (see: "Murder to Excellence"), and he has plenty of material to draw on these days. From the increased visibility of police brutality to a seemingly endless spate of school shootings, it's really only a matter of what, not if, Kanye chooses to denounce in song.
Then again, 'Ye's more pressing interests these days seem to be fashion and fatherhood. So we'll see.