It could be done by a revolution, like in any country. It could also be done through the political system itself through having referendums.
very
The UK has a democratically-elected parliament.
Apartheid
Its political system cannot be easily changed.
From the very start there were two thoughts of how government should be and these developed into political parties. Through the years they have changed names, and changed ideas about government.
they are polish.. they dont have a political system they have a republic political system, actually
What the Economic system v. political system
After wars, political boundaries are often changed
A system of political limits and controls is system of powers
In the UK
The big two are the Conservatives, and Labour, though the Liberal Democrats did well enough in the last election, that the UK political system can no longer be considered a two-party system.
It changed maps. it changed people. It changed the political landscape of the world.