Final answer:
The National Pan-Hellenic Council is the main group responsible for setting fraternities' policies and strategic vision, in addition to each fraternity's internal leadership structures.
Step-by-step explanation:
The group responsible for setting the policies and strategic vision for fraternities is often the National Pan-Hellenic Council (NPHC). This collaborative organization includes nine international Greek fraternities and sororities. Each individual Greek organization, such as the historically significant Alpha Kappa Alpha Inc., also has internal structures like an executive board or national council that contribute to the setting of their own specific policies and vision.