Slavery began in the colonies of America in the 1600's. There were a lot of factors that caused slavery. The majority of slaves in this time period worked on plantations. What is stated in the following paragraphs are the reasons for how slavery was started and details of Plantation slavery. Slavery was caused because the english settlers needed to make money and indentured servants were declining they decided they could still produce products by having slaves work for them since there was a higher abundance of them. The warm climate of sl ....