Well, you have to think about how this could have happened. A lot of cities and countries have all been hit by some sort of disease or natural disaster but do they both have them. I would say false, you have to understand that not only do they go under that they also suffer from economy losses and from political misunderstandings and troubles. So no, those would not be the only two common factors.
When people are treated poorly based on their race or skin color
Various motives prompt empires to seek to expand their rule over other countries or territories. These include economic, exploratory, ethnocentric, political, and religious motives. Economic: Imperial governments, and/or private companies under those governments, sought ways to maximize profits. Industrialization and competition with Europe for power were factors that contributed to the growth of European imperialism. The effects of these factors were that they were able to use weaker nations to meet their commercial needs and if they had many colonies they would be grow to be richer and powerful.
