Imperialist nations in the 1800s believed that having many colonies

Will demonstrate their strongest as a Empire.

Explanation:

Back then, an Empire was catalogued as strong if it had many colonies under its almighty power. Mainly because people believed that mighty empires were blessed by god only.

Also, the economic issue was a reason to keep the expansionist policy. For example, The Empire of Spain, one of the reason that Colon could travel to the Americas, was actually the lacking economy that Spain was having back then.

john locke studied medicine and he laid a lot of groundwork for the enlightenment he also contibutied to the development of liberalism

maybe you should ask google for the answer for the question you're looking for