What are the factors (political, economic, socio-cultural, science and technology) that contributed to the growth of ancient American civilizations?

50 points in at least two paragraphs, discuss the differences between the principles of republicanism and democracy. explain whether you think the united states is more of a republic or a democracy. refer to at least one example from the constitution.

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

What is affirmative action as a social program intended to accomplish? do you think it has been successful? what are some specific examples that you can offer to support your answer? this is for my multicultural studies class i need asap !