Because in other people’s experience, it has been better.
Therefore, it is the tendency for even the virtuous and wise, once they gain power, to be tempted to use their power for unworthy ends. So it tends to work out better to distribute the power as widely as possible, so that the corruption of the few does not work to the detriment of the many.
This is not to say that the many are above reproach. But the majority tends to act as a check on the various factions that are generally a minority in the larger society.
For a democracy to work, you need a large middle class - the bourgeoisie that Marx talked about. As long as the majority identifies itself with the culture around it, it tends to shape or re-shape the society to preserve their values and interests. And thus the greatest good of the greatest number tends to create further identification with the society, and people will act to preserve and protect what they see as their interests.
That’s why people vote. My individual vote means almost nothing. But the fact that so many people believe as I do, in the preservation of the society, means that we act as a group.
I don’t mean voting for one party or another. I mean commitment to a Constitutional republic, where the accepted method of reform is to vote for candidates and not, for example, armed revolution.
And people can see the historical record. That’s part of what is meant by America being an example to the world. The French had a revolution, and wound up with Napoleon Bonaparte. The American revolution wound up with George Washington.
People figure out that democracy works better than self-serving ideas like the divine right of kings, or theocracy, or any of the other modes of government that have been tried over the centuries. It’s not inevitable that democracy wins out, but that is the trend of history.
Regards,
Shodan