When did slavery take place and when did it end?

Slavery has ALWAYS been a part of human history. -It rose to a peak in the 1700's to mid 1800's ,but has never totally ceased.

It is a popular concept today in 'civilsed ' countries that there is no slavery.

That is wrong, slavery still happens in many places in Europe, Africa and Asia. -It is just much more hidden than it used to be.