Answer:
I think certain themes apply to civilizations separated by thousands of miles and hundreds of years because humans tend to live similar issues and circumstances that made them make decisions conducive to solve problems, although many different ways of thinking oppose a single way to resolve things
The Magna Carta led to the creation of Parliament, England's LEGISLATIVE BRANCH. hope this helps !
Comparative advantage I would think. Yep, Google-sensei confirmed it:) Comparative advantage is the answer.
The Federal Government receives finding from taxes coming out of salaries, which is called income tax. In the US especially, taxes contribute to the funding of Medicaid and social security benefits.