The 1511 Dominican sermons were the first abolitionist challenge to New World slavery.

Evidence

Sickened by Taíno slavery, the Friars stunned Las Casas and broke abolitionist ground, rejecting the Spanish line (taken from the Portuguese) that the Taíno people benefited, through Christianity, from slavery. King Ferdinand promptly recalled the Dominican Friars, but their antislavery sermons never left Bartolomé de Las Casas. — Ibram X. Kendi, Stamped from the Beginning, 60

Categorization

• QUESTION: Worth chasing later: did these 1511 Dominican sermons really constitute the first abolitionist argument, and what exactly did they say?