We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed...
Like anything else we cannot reason anything out without God. This is ultimately why Marxism is a lie. Try and reason anything out, without God, and it is imperfect at best, which is a lie. We can indeed rationalize out, with the help of God, nations and national identity as God separated a people from his own creation for himself, a nation called Israel. We can also reason out for ourselves our family from which we sprung as our own nation, which is where nations arise from.
Indeed. Which is why secular enlightenment ALWAYS leads to the Marxist/proto-marxist oppressor verses oppressed conflict. By reason alone, the very meanings of liberty, freedom and justice are changed or conflated such that they become self-contradictory.