How many people were involved in the mexican revolution?

How does an oligarchy conflict with democratic principles

What from the columbian exchange had perhaps the biggest impact on the world?

The establishment of columbia as the state capital was important because a) it was located in the heart of the upcountry. b) it was located in the heart of the low-country. c) it was already established as a vital industrial center. d) it represented a compromise location central to most citizens.