The purpose of adding the Bill of Rights was to ...

protect people from government abuse

assure the end of slavery

strengthen the power of the government

allow the adoption of amendments

Answer

Protect the people from government abuse

Protect the population from abuse.

Explanation:

The Bill of Rights spell out some of the most important rights of our country. The freedom of speech, protest, press, etc. Those rights, in theory, protect us from totalitarian and authoritarian governments from infringing on our lives.