What is the main idea of having checks and balances?

The system of checks and balances is an important part of the Constitution. With checks and balances, each of the three branches of government can limit the powers of the others. This way, no one branch becomes too powerful. Each branch “checks” the power of the other branches to make sure that the power is balanced between them. How does this system of checks and balances work?

The process of how laws are made (see the following page) is a good example of checks and balances in action. First, the legislative branch introduces and votes on a bill. The bill then goes to the executive branch, where the President decides whether he thinks the bill is good for the country. If so, he signs the bill, and it becomes a law.

The tenure of kings and magistrates

Idon’t understand your question but if u mean the difference in america vs in africa