Why did the french revolutionary government offer freedom to slaves in haiti

The French Revolutionary government offered freedom to the slaves in Haiti as part of the passage of the Declaration of the Rights of Man on August 26, 1789. Although the abolition of slavery had been contemplated by some members of the Assembly prior to the adoption of the Declaration of the Rights of man, most scholars agree that the inclusion of Haitian emancipation was not fully contemplated by the drafters and was largely the result of revolutionary fervor that swept through the assembly on that day.