I've been thinking about this lately and I think the last point at which Internet driven mass politics was a progressive force was the early 2010s. Tahrir Square (2011), Euromaidan (2014), Scottish Indyref (2014).
(now, how organic was that? Probably impossible to tell at this distance in time)
The Facebook driven Rohingya genocide was starting up in the same time frame (adoption in 2011, military forces deployed in 2017). But following the effectiveness of social media as a revolution-triggering force, governments and political parties had to catch up and control it for their own purposes. Now we have what's effectively been a rightwing revolutionary force derived from the Tea Party take over the Republican party and replace it with strongman populism.
(now, how organic was that? Probably impossible to tell at this distance in time)
The Facebook driven Rohingya genocide was starting up in the same time frame (adoption in 2011, military forces deployed in 2017). But following the effectiveness of social media as a revolution-triggering force, governments and political parties had to catch up and control it for their own purposes. Now we have what's effectively been a rightwing revolutionary force derived from the Tea Party take over the Republican party and replace it with strongman populism.
HK protests (2019): https://news.sky.com/story/hong-kong-protests-facebook-and-t... ; Chinese government taking action against the last of the 2010s protest wave.