5 reasons that allowed European countries to become great empires.

1-     The unification of some countries not only in territory but in keeping the same type of government, so the culture and traditions keept strong the people sentiment of nationalism.

2-     All of them were looking for more power in taking decisions and in forming allies, especially the ones in their colonizated territories..

3-     They were looking for economic growth, so the imperialism principles that they adopt make them expand their empires to other continents.

4-     All of them were trying to find a type of government in which monarchs and a parliament worked together.

5-     They worked together to defend what was theirs and to protect the unity of Europe, as their influence in the intercontinetal colonies, in wich they imposse their laws.