Conditions of the Slaves As They Were Brought to America and Why Slavery Thrived in the South Discuss the conditions under which slaves were brought to America. Why does this institution thrive more in the south than in the other colonies? Slavery existed in all of the English colonies in America. For land owners, slaves were much more valuable than indentured servants. The master owned the slave for life, in the same way as a horse, and any children of the slaves would become slaves. The English colonists were not planning on establishing slavery, it happened gradually. Blacks were