US and the UK.

The US and the UK possess two varied versions of democracy in the form of a presidential system and a parliamentary system respectively. The American president, directly elected by the people, is the chief executive while in the UK, it is the prime minister who is elected by and drawn from the parliament. Therefore in the UK, the executive ascends to the position by commanding support in the legislature which is often dominated by his or her party through a majority. Due to this relation between the prime minister and the parliament, the executive-legislative function is fused in a parliamentary system of democracy. This is in contrast to the presidential system which is based on the Separation of Powers between the executive, judicial and legislative organs of the state in order to check the concentration and abuse of power by establishing checks and balances through independence of state institutions.

Regardless of the difference in both the systems in these two countries, they have been very successful.