By the mid-eighteenth century, slaves gathered socially on sundays in which area of new orleans?

By the mid 18th century slaves gathered in what is nowadays known as Congo Square, located in the Treme neighborhood of New Orleans, it was first know by the name Place des Negres. It emerged as a public activity locale, and soon became a market area for African slaves.

Thomas Hobbes
He wrote a book in 1651 called the Leviathan where he introduced his "Social Contract Theory."