Answer:
What does the Europeans want from these countries? Raw Materials. Why? During that time Great Britain industrial revolution was going on. You need raw materials like Iron to create products to sell. Boost europeans economy, so they exploit other countries.
How? Most common strategy they use was Divide and Conquer. They divide the country up, make them fight each other. Then use that weakness to control both sides. Europeans believe they have a far superior govt. than other countries, so they will "parent" other countries. Another way is promising them technology, medicine and education. Once again these countries they are imperializing are far from advanced than Great Britain.
Alexander the Great destroyed the city of Thebes because he wanted to send a message to the other Greeks that were thinking of revolting like Thebes did. Thebes and other Greek city-states had a pact with Phillip II, Alexander's father, king of Macedonia, that they would be a part of Macedonia. When Phillip died and Alexander took over Macedonia, the Greeks did not want to bow to a 'child' (a 20 year old). Also it had been rumored in the cities that Alexander was dead and it was the perfect time to revolt. That is the reason Alexander the Great destroyed the city of Thebes.
It proved that the world was round to all the people who didn't believe so then.
