You need a certain standard of literacy, moral and ethical values, to be able to run a one man, one vote system.
The ultimate test of the value of a political system is whether it helps that society to establish conditions which improve the standard of living for the majority of its people.
Countries that are agricultural can, at a low standard of living, sustain themselves. You can be self-sufficient; the money economy is a relatively insignificant part of the total economy. Singapore never was an agricultural country.