According to Ev Williams, the founder of Blogger and Twitter, the Internet now is much more reflective of the real world than the internet 20 years ago, when he was getting started. Now, the internet actually has all the people of the world.
When things were small, they were manageable. The bad actors did not get the momentum to share their ideas. The networks were also less connected and lest immediate so there wasn't a potential for abuse. The internet 20 years ago did not have the impact on what people read and believed in, how they voted.
Now that everything is so intertwined, there are all these new problems to be solved.