 Voices condemning the slave trade were raised quite early on during the Atlantic Slave Trade period.Among them was Gaspar da Cruz (1550-1575), a Dominican friar who dismissed any arguments by the slave traffickers that they had "legally" purchased already-enslaved children, among the earliest condemnations of slavery in Europe during this period.From an early age during the Atlantic Slave Trade period, the crown attempted to stop the trading of non-African slaves.