While human nature isn't likely to grow less evil over time, there are some moments in history when it just is a bad idea to be a dictator. We may be living through one of those moments now.
Certainly the events in Ukraine and Venezuela seem to suggest that, if not in outright retreat, the autocrats of our time are finding that there is no such thing as 'ultimate' power. At the very least what this shows is that modern dictaotors have not yet fully absorbed the lessons from history's more successful autocrats on managing unrest and consolidating their rule, lessons we discussed in our book.
The one seeming exception? Vladimir Putin, of course, but more on Russia later.