Last revolution was the civil war. The people at the top forgot what the people at the bottom are capable of.
That depends how you define "revolution" (if you set the right scale cut-off, it was the last armed revolt meeting the cutoff, but not all "revolutions" are "armed revolts" and vice versa; particularly, for the latter, "revolution" often implies success, not merely an attempt, at replacing the aspects of the status quo ante against which the putative revolution is aligned, which those revolting in the Civil War spectacularly failed to do.)
One could argue that some or all of the suffrage movement, temperance movement, and civil rights movement (and maybe others) were "revolutions" that are more recent -- and more successful (if only in the short-term, in the second case) -- than the Civil War, though none of them were primarily armed revolts.
That isn't true now anyway?
I don't advocate for anything, all I know is if the current trend continues, like every other free society that has gone down this same road, It will end very badly and then will improve for a generation or so.
"The tree of liberty must be refreshed from time to time with the blood of patriots & tyrants. it is it’s natural manure." - Thomas Jefferson
That's, of course, humoring the notion that this is in the cards in the developed world. If you step out of the echochambers on the Internet and interact with people in reality, you begin to see that things aren't nearly as bad as the curated outrage porn would lead you to believe.