One-party system leads to

Explanation

The disadvantage of a one party system is that there is no check on the power of the Party. This inevitably leads to corruption and abuses of power. What's more, a one-party state cannot be maintained without secret police, repression, and suppression of the free flow of information. This can lead to a dictatorship, which is a form of government in which one person or a small group possesses absolute power without effective constitutional limitations.