I don't think there is more violence and corruption now, relative to the population increasing over the years. Of course, social media and internet are an obvious reason that we hear so much more, so quickly. But the problems are not new. Methods; maybe. But the results are the same.
I think we can find a big part of our answer without opening a book. We just have to listen. If you look at so many of the crimes we hear about today, 50 or 70 years ago, people just didn't talk about them. Many of these crimes remained behind closed doors because of the stigmas they carried with them. Women didn't come forward when abused physically or sexually. Nobody discussed the violent drunk at home. No one talked about teen pregnancy. The list goes on and on. So the crimes have always been there. We just didn't hear about it because talking about them was "taboo".
Over the last couple generations, there has been such an extreme change in what is acceptable to talk about publicly, that people just automatically believe that these things didn't exist in the past. But they did.