Answer: SECRET SOCIETIES TAUGHT STANDARDS FOR PERSONAL CONDUCT.
Explanation: A secret society is an association of members, a fraternal organization, or other association which admits only selected individuals as members, whose meetings and practices are often ritualistic and not public, and which often has the purpose of furthering the social or economic opportunities of its members.
Secret society in Africa taught it's members standards for personal conduct by giving out rules and regulations that it's members must abide by.
Some examples of secret societies in Africa are; Ogboni; woke; leopard society; poro; nyau. Etc.