The problem of the justness of Native American's slavery was a key issue for the Spanish Crown. It was Charles V who gave a definite answer to this complicated and delicate matter. To that end, on 25 November 1542, the Emperor abolished slavery by decree in his Leyes Nuevas New Laws. This bill was based on the arguments given by the best Spanish theologists and jurists who were unanimous in the condemnation of such slavery as unjust; they declared it illegitimate and outlawed it from America—not just the slavery of Spaniards over Natives—but also the type of slavery practiced among the Natives themselves Thus, Spain became the first country to officially abolish slavery.