Humanity oscillates between democratic and autocratic governments. Think of it less as a binary and more of a spectrum.

On one end you have democracy. Inefficient, but admirable. Political will, in its entirety, bestowed upon the people.

On the other end is autocracy. Only as effective as the individual upon whom all political will is bestowed.

The advantage of autocracy over democracy is quite elementary.

In a democracy, if an individual disagrees with the political will, they must work tirelessly to educate and persuade the minds of those who make up the electorate. In an autocracy, one must simply educate and persuade the autocrat.

Or kill them.