Original: The Five Families, under the suggestion of Salvatore Maranzano and Charles "Lucky" Luciano, were responsible for the establishment of The Commission, a council which demarcated territory between the previously warring factions and governs Mafia activities in the United States.
Simplified: The Five Families, under the suggestion of Salvatore Maranzano and Charles "Lucky" Luciano, were responsible for the establishment of The Commission, a council that changed how things worked with Mafia activities in the United States.