What countries have been colonised?
Spain, Portugal and France are three countries which have been colonized. Also, the Kingdom of England and the Netherlands are two other countries that have been colonized.
What distinguished between legal systems of countries already colonised and countries that were never colonised?
Most of the countries that once were colonies got the legal system of their new 'mother' country. So many former colonies still have a legal structure based on the European legal systems, which usually entails the system of 3 mutually independent 'powers' within Government: legislative, judicial and executive. Third world countries that were never colonised mostly did not have such a '3 powers'-system originally. Today however most countries - former colonies or not - have…