In america democracy, why is the principle of checks and balances important?

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.

In keeping their culture unchanged what do canadians fear the most?

In the latter stages of the civil war who was given the responsibility of winning the war for the north