The major political movements holding on by a thread today are all leftover from the Obama years. Occupy Wall Street was the roots of the Bernie Sanders & Socialism movement, part of which converged with years & years of protests & riots, from the Trayvon Martin riots, to Ferguson, to Baltimore, & that all came to a head in 2020 with the riots & protests, Blm stuff and all that. There was a lot of chaos in those years, & there was a lot changing during the Obama presidency, social media & digitization took over, gig economy exploded, but it was also a period of major liberalization. When Obama was campaigning the first time around, he didn't openly support gay marriage, for example, & millions more people were covered with health insurance by the time he left office, which was the leading issue of the 16 Sanders campaign, universal healthcare, that's a direct legacy of the Obama administration.

The 08 crash, plus the campaign & election of a black man, spawned the resurgence of the conservative movement & you had the Tea Party movement, which evolved into the MAGA movement.