Slavery social and legal system

Slavery social and legal system permitting human beings to be bought and sold in the formal market and forced to work for the purchasers as their private property.The rise of free labor ,gradual industrialization and humanist movements from the second half of the nineteenth century made slavery gradually unpopular and socially unacceptable.Bengal free from slavery from the early twentieth century.As free labor was not available in the market ,socially and economically weaker elements in the society were reduced to slave by in order to sustain production and maintain their dominance.To continue and sustain public works like constructions and maintenance of public buildings ,dams,bridges,highways,the city needed big labor force.People marginalized by famines,wars and caste system were the main victims of slavery.Many of the orphans,paupers,widows also ended up on the market.Thugs and other criminal elements kidnapped children for selling them.There were two dominant categories of slaves:Domestic slave and Agrestic slave.Most agrestic slavery was a common features of in bengla from ancient times of the end of nineteenth century.Today,we can not see slavery,but still many peoples and children works like slavery.