Final answer:
The Bantu peoples constitute about one third of Africa's population, having spread their languages, agriculture, and culture across subequatorial Africa during significant migrations from their origins in West and Central Africa.
Step-by-step explanation:
The Bantu peoples make up a significant portion of Africa's population, with Bantu speakers constituting about one third. The Bantu expansion was a vital historical movement that spread not only languages but also agricultural practices, cultural beliefs, and ironworking skills throughout subequatorial Africa. With roots likely in West and Central Africa, the Bantu migration saw these people establishing communities and influencing local environments, becoming a foundational aspect for later civilizations, like the Swahili speakers along the East African coast. They share a common ancestry in the proto-Bantu language, with over four hundred Bantu languages being spoken across the continent today. The Bantu hold a collective belief in a supreme God associated with the sky, and they maintain moral and societal values that have influenced African philosophies and are reflected in the principle of 'Ubuntu' which emphasizes humanity and interconnectedness.