1. Citizens have the power by voting for their leaders and representatives.
Democracy
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2. A political group that rules the whole country
A political group that rules the whole country. If you are part of the political party, then you vote.
Oligarchy
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If you are not part of the political group, you have no vote and no say in government.

3. Autocracy
Only the one ruler makes the laws and final decisions. They may delegate enforcement, but final say is the leader’s!
The common citizen doesn’t have a vote and is rarely consulted!