Why was slavery introduced and allowed in georgia during the trustee period? the end of land-ownership restrictions led to the development of large plantations needing more laborers. the appointment of a new royal governor who favored slavery led many planters to ignore antislavery laws. the sharp population decline among the native people in the colony made it necessary to look for new sources of labor. the end of the war with spain allowed planters from florida to settle in georgia, bringing their slaves with them.