1. At the beginning of the 20th century only few countries of Europe and America were independent,
e.g.: Spain, France, England, Norway, Argentina, Chile, Bolivia and Peru, the USA, Canada, Alasca.
2. After World War II almost all countries fought against colonial powers and got independence.
3. Though there are still some non-democratic countries, we can call 20th century as an era of democracy.
b) During the early 20 century, democracy was mostly in the continents like Europe and Americas. While in certain continents like Africa and Asia there were almost no democratic countries.
c) Even today there are certain areas that have not established democratic governments such as Saudi Arabia and Ethiopia.