Re: unlike in the UK....
"I got a few thumbs down for saying it, but the American constitution and system of government is a historically amazing human achievement. It was an isolated event drawing much inspiration from the French revolution (via B.Franklin ), and coming "hot on the heels" of the English civil war. But the ideal of "life, liberty and the pursuit of happiness" is simply an amazing observation."
The American constitution and system of government is nothing like an isolated event. It is explicitly a fork of the British system, run locally so as to be answerable to local needs. It was designed to be bicameral with one house that lots of people are elected to and the one house that a small number of people are chosen for by other important people. It uses an adversarial, precedential legal system based on the premise that everything is legal unless explicitly proscribed. It explicitly adopted all British case law up to the cut off. Major political party for the first half century? The Whigs.
The British system, of course, directly descends from that imported from Normandy by William the Conqueror in 1066. Ever wondered why we have mortgages, a few of which are puisne, or why civil wrongs other than those arising due to contracts are called torts?
Converting Locke's "life, liberty, and estate" to "life, liberty and the pursuit of happiness" does not an isolated event make.