The statement, "All Men are Created Equal" resulted from opposition to the 'political dogma' of the day, "The Divine Right of Kings."
The Divine Right of Kings defined royal absolutism. It aligned any monarchy with God.
The Divine Right of Kings allowed co-mingling of authority in that BOTH civil law and religion came to bear in the decision making (decrees) of any monarch. It was the clear understanding during the Founding Era of the USA, that other nations believed in the 'idea' their monarchs were equivalent to God, in that they were somehow 'connected' through a magical relationship with God. In other words, the equivalent of a faux 'christ' that provided them with unchallenged rights to decide the lives of people and decide life and death.
Thomas Jefferson in seeking freedom from such an oppressive RULING CLASS included the words, "All Men are Created Equal." It was a clear statement that people were foremost the ONLY authority to government and laws. A very clear departure from a 'connected' and 'mutual' authority by government with God and the very basis for the separation of church and state.
