Answer:
The most important thing this kind of division avoid is absolute power, and the creation of a dictatorship.
Step-by-step explanation:
When Montesquieu proposed this government idea, the majority of countries in Europe were ruled by Kings with absolute powers. He saw many problems with this kind of government, especially the arbitrary decisions made by the king who was supported by the perception that the laws were based on divine support. This division in the power would avoid these arbitrarities, and propose a limitation on the government. By this idea, each power would be independent and harmonic, but they should communicate with each other.