Answer 1:
The Concert of Europe refers to a general consensus among the Great Powers of 19th-century Europe to maintain the European balance of power, political boundaries, and spheres of influence.
Answer 2:
The old traditional empires stretched over continents gave way in Europe to the nation-state. Change was coming.
The main goal of imperialists was to enrich the home countries. They would colonize Africa and use the colonists as cheap labor force, often as slaves, and would produce things that were cheaper and would take all of their resources and sell them or manufacture things from them. This would bring wealth to the colonizer but no wealth to the colony itself.
They are reserved to the states respectively, or to the people.
