I completely agree on there being fewer voices heard in the last quarter of the 20th century. I don't remember it being that reason driven with people like Reagan, Thatcher, Bush I, Newt Gingrich, Rush Limbaugh, Tipper Gore, and televangelists.
I still wasn't entirely prepared for the US turn to authoritarianism (how I'd describe Bush II) into straight up white supremacist kleptocracy. I didn't expect they'd make the subtext into text and the media would be fine with it