ABSTRACT
Historical mechanisms' allow rational analysis of world history under Unitarian views in its complexities and dialectical differences, especially power structures and their conflicts. 'Historical mechanisms' represent the unity of world historical processes, which usually would fall apart with the enormous chaos of details. Historically, there are two types: the primary chaos describes the original state of mankind before and outside of civilization and it affected all civilizations. The secondary chaos comes after disintegration of a central structure such an empire in successor states. The rise and fall of empires is also influenced by the environment as a number of examples have shown. The environment does not only influence a political entity through natural borders or its culture with specific geographical aspects but the environment can also impact on the rise and fall of empires, especially through climate change.
