Most of these problems are related to the emergence of the federated mass media that seriously changed the way people received information and shared ideas.
The American Revolution was, in no small part, sparked by one man's widely circulated pamphlet. As radio and TV with extremely high production values became dominant and the accepted standard, the relative credibility of a pamphlet from some guy you've never heard of before plummeted. People could still self-publish and make small runs, but when contrasted with the professional output from a slick media company, there's no contest as to which report your average person would be more likely to accept.
Media has been in corporate control for the last 100 years or so. Why is the draconian extent of our intellectual property regime widely despised and mocked by those lucky enough to be clued in to its absurdity, yet almost never discussed in the news? Because the small handful of companies with a TV studio and an FCC license have a vested interest in keeping the curtain drawn on the Great and Powerful Oz. They don't risk attempting a propaganda backfire on the topics they're really worried about; they just refuse to discuss them, and for the last 100 years, that's been enough to make counter-corporate effectively silent.
As mass media and telecommunication via phones made it feasible to communicate with people across the country in a matter of minutes, people sort of stopped seeing why they needed to go to a local authority (who could easily be overruled by other competing local authorities) when they could go straight to the highest authority. Combine this with the fact that the highest production values and most recognizable faces were covering the national beats, and that local news outlets can't go more finite than the state and sometimes county level for practical reasons, and you have a recipe for a populace that knows nothing about their immediate political leaders.
The internet has democratized mass media and given a credible voice back to the little, non-corporate guy, after 100 years lost in the darkness. And that really makes the corporate propagandists mad.
A lot of problems today flow out from struggling with and trying to learn how to handle the closeness that has been afforded by things like instant telecommunications and fast, reliable interstate transportation across the sky and the nation's highways. One non-political example: neighborliness is going away (as is socialization in general).
In former times, people relied on their neighbors and neighborhood because they had to. You couldn't exist in a physical space without having a moral responsibility to it and the people around it. Now that everyone's friends and families live in their pockets, "neighborly" relations, in the classical sense, are disappearing. My family and I have lived in half-a-dozen different places over our marriage so far, and in each case, we've never had a nextdoor neighbor come introduce themselves or welcome us to the neighborhood. And to be fair, we've never done this as neighbors have moved in and out around us either.
tl;dr Mass media, shipping, and telephones made it so people only needed to care about federal level anymore.