Answer:
The factor that has helped spread West African Culture the most is, ironically, the large human movement from West Africa to the Americas that the Atlantic Slave Trade represented.
Explanation:
Over 12 million Africans were shipped from Africa to the Americas during the course of the Atlantic Slave Trade, which lasted around 400 years. The majority of these enslaved Africans were from West Africa.
When they arrived in the Americas, they were subjected to brutal treatment, and the condition of slavery, but, in spite of this, they managed to develop some cultural forms, most of which stemmed from their original cultures back in West Africa (alongside new cultural elements taken either from European or from Native American infuences).
