Where did the founding fathers get all their ideas concerning rights equality and liberties?
The founders were al very well read. They were all clearly influenced by the writings of Aristotle, Sophocles (e.g., Antigone), and other Greeks, The Bible, Roman Law (the Justinian Codex) and the English philosopher John Locke. and the magna carta, and the English Bill of Rights.
The founding fathers of the USA believed that individuals were born free, and that freedom was a gift from God. They did not want a overly strong central government to have the ability to negate the civil liberties of its citizens. With that said, the US republic was so devised and was ruled by a fair central government as described in its founding document, the US Constitution.