It means that everyone is equal, we all have the freedom of life liberty and pursuit of happiness, and that to make sure we have these and our rights are not impeded upon, we have created and managed our government, and our government gets its power from the citizens of the USA
I would go with realism bc the definition of it is: the attitude or practice of accepting a situation as it is and being prepared to deal with it accordingly.
I hope this helps you :) also, if you could choose two answers I would go with intellectualism too
