The author means by the phrase that People were able to choose who would lead their governments.
Explanation:
In the 20th century there were a lot of new nations that were formed out of old imperialistic colonies and most of them adopted, or ended up adopting a democratic system of governance where the people have the right to choose who would govern over them and the positions are rotating.
This is something that could be called to have given greater ability for the people to govern their own lives and the author has teemed the century thus as the century where the [power went to the people.
The Black Death was a huge plague spread by Rats that was very contagious, it devastated Europe and killed many people, once it was done away with new tides turned and new foot holds of power proceeded forward due to knew tech, and different method of thinking.
Maybe expelling the Christians ;). But if we look at it seriously, people should learn to adapt and live with each other, without thinking that someone is under their level, not worrh the citizenship etc.
I hope this helps!
Explanation:
Entrepreneurs can change the way we live and work. If successful, their revolutions may improve our standard of living. In short, in addition to creating wealth from their entrepreneurial ventures, they also create jobs and the conditions for a flourishing society.