Definition of democracy:
This ensures that decisions work to the benefit or have the support of most of society.
decisions can be made that only benefit a small segment of society,
Decisions also wouldn't necessarily have the support of much of society, causing discontent.
When people are shut out of the decision-making process, often their only recourse is violence.
Democracy creates the best conditions possible for broadly improving the standard of living and creating a stable government that is supported by most of society.