Democracy

create a weak central government

Karl Marx argued that everything in society is secondary to economic reality.

Not in that sentence. If you mean "something belonging to the governor", then it should have an apostrophe. If you mean "more than one governor" then it should not. (If you mean something belonging to more than one governor, then it should have one, but it should be after the s instead of before it.)

To preserve the independence of the states

In a presidential government, the president is both chief executive and head of state.

Bias is the set of preferences or prejudices a writer has about a subject

THe rights granted by the Petition of Right were later reflected in the Articles of COnfederation. -Apex :)

The Magna Carta was the actual answer, Anonymous was right.

In a constitutional government, the powers of government are limited by a written document.

justice for all

No one, not even the king, is above the law.

Citizens in ancient Greek city states developed ideas about representation that established direct democracy

The government should protect the rights of its citizens. Apex

Recognized as legitimate