I don't see anything that I'd explicitly disagree with, but I also can't help but have a feeling that something is lost in translation. I'm not sure that Descartes and African philosophers are talking about exactly the same thing when they say something like "person".
Of course they told about different things. Distinction between self/other is a definition of a person. But at the same time they spoke about the same thing. If you killed a person, you would be a murderer, and it doesn't matter what definition of a person you use. There are some small differences though, like killing a toddler seems not so bad, if toddler is not a person yet. I personally believe that toddler is not…
Why draw the line at age 3, and not 9 (Age of Reason) pubescence (Coming of Age), or post-pubescence? People under the age of maybe 30 universally have terrible misconceptions about how the universe works, making them dangerous if they are given full freedom.