The "militia" is not a disorganized local bunch of gun nuts but is tied to the government.
It is an outdated idea since a small militia has no meaning even if there were foreign
invaders. The "militia" of the early 2nd Amendment in the Constitution didn't account for the use of hand grenades, bombs, AK47's, automatic weapons or machine guns.

In talking about any political system, they all break down somewhere. There is no pure democracy even in ancient Greece which had slavery.

The point is that there are parts of any political system that work well. There are democratic principles that can be applied to government, capitalist economic principles and socialist principles.

They all work not in a totality but parts and sections. The trend toward democracy is a good idea whereby the people have a voice in government. Some capitalism has to work if you don't want the government making your clothes. Some socialistic ideas worked very well under FDR. There never has been an absolute system of democracy, capitalism, socialism or any other. Absolutes in systems tend to lead to tyranny which then defeats the purpose of the "absolute".