Answer:
European exploration of the 1400's lead to the discovery of less advanced seemingly primitive societies in formerly undiscovered parts of the world. Later gradual assimilation and subsequent colonization of these discovered places was seen as a nation's military and political strength, and nations with control of more colonial states were seen as politically superior in Europe. Controlling external colonial territories also meant creation of more political positions within the colonizing countries to manage the affairs of these external colonies.
Economically, colonial states provided European countries with industrial resources to cope with the already dwindling resources in Europe. Taxes and other levies from colonial citizens were used to finance European countries' economy.
B. Rule by a king or queen
The governor of Virginia was ordered by the king to spread into the Ohio valley river because of the rising population and the need of expansion. The french built forts so as to scare people away and prepare for a possible war, which was alarming to the governor of Virginia who couldn't spread into that land because of them. When he asked the French to leave it, they denied him his request and soon after the war began.
The collapse of the Soviet Union caused profound changes in nearly every society in the world. Much of the policy and infrastructure of the West and the Eastern Bloc had revolved around the capitalist and communist ideologies respectively and the possibility of a nuclear Warren.
