Why Is Africa So Primitive?

Africa has 18% of the world’s land, 13% of the world’s population and 1% of the world’s GNP. Why? Corrupt government and corrupt societies and corrupt interpersonal relations (such as failing to arrive on time to meetings, respecting other people’s property, education, commitment to family, etc). People in Africa often won’t buy more than a day’s worth of food because by so doing you’re inviting neighbors to come in and take it. Why are American Indian and Aboriginee reservations so barren?