The solution for Africans abroad is more complex than simply adopting the outer forms of indigenous African practices. The spiritual essence of indigenous Africa infuses all the religious traditions of the world. This is a point that Africans should emphasize to the rest of the world.
The practices of any tradition are mere forms, containers for a much more profound and universal content. It is the content that all spiritual seekers, of whatever tradition, should seek. The outward forms are what people have managed to fight ceaseless wars about for all these years.
In order to bring true balance and alignment (Ma'at) to themselves and to the rest of the world, since they are the ONLY people morally capable of doing it, Africans should be looking at ancient African religion for the deeper VALUES, which sustain all human beings, and promote those, not outer material forms.
As for forms, people can adopt what they prefer, or if they prefer, adopt no forms at all. The advantage to this approach is that by dropping forms you eliminate the pretext for conflicts altogether. The 'religion' that will best serve the interests of everyone in the world, including Africans, is the religion of 'no religion.' In its place, a profound spirituality that sees, as our ancient African ancestors did, the entire content of the earth and the universe as sacred, as manifestations of the Divine that is All.
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