Islamic law’s ban on selling fellow Muslims reduced Muslim enslavement

Evidence

Notably, Muslims were religiously prohibited from selling other Muslims. This proscription, not always followed by African Muslims at the time, limited the number of African Muslims sold into the transatlantic slave trade. It also caused some war captives to convert to Islam to avoid enslavement. — Sahar F. Aziz, The Racial Muslim, 570

Categorization

• XREF: Parallels early forms of religious-protection exemptions in coerced-labor systems; connects to Milgrom’s work on how shared norms structure in-group trade/exchange behavior.
• QUESTION: How widespread was conversion-to-Islam-as-protection, and did it produce measurable demographic differences in which West African groups ended up in the Americas?