It has no trace in Human Race, atleast in present times. See closely with your open minds, watch the actions in the name of Helping other Humans you will find enough proof that Slavery exists in Different Form.
It is clearly not Chained in steel or ropes! Rest everything is Chained ————-
Chained in the words, thoughts, Mind.
It has substantial traces of its Existence in the form of ————–
Emotional blackmail or Blackmail in some form or both!
It makes many wonder
Man is most intelligent Species in this Blue Planet but makes some other Man a Slave!