Answer:
Through the Atlantic Slave Trade slavery introduced in America.
Explanation:
The triangular slave trade also is known as the Atlantic Slave Trade, began from the late 16th century. It carried manufactured goods, slaves, cash crops, between Europe, West Africa, and American colonies.
A desire to earn profit forced European powers to allow the system of slavery in colonies. In colonies, the plantation economy introduced where slaves used as labours in the fields of cash crops like rice, sugar, tobacco, indigo, and cotton. There was also a conflict to protect human rights because slavery was part of bondage, which allowed no rights to the people. The protection of human rights remains neutral as Britishers earned profits in the colonies by getting regular supplies of raw materials.
In 1794, the Slave Trade Act passed by the United States Congress as anti-slavery trade-acts which limited American involvement in the international slave trade.