Why has the idea of democracy survived wars and oppression?

The idea of democracy has survived war and oppression because is ideally based on a solid fundamental design. Democracy allows people to determine their political fate by giving them the opportunity to choose their leaders in an election. As such, it allows people to largely control themselves  

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

yes they have. but is this a true false question? if it is, the answer is true.