emancipation

noun2

1. •
   The act of setting free from the power of another, as from slavery, subjection, dependence, or controlling influence.
2. •
   The state of being thus set free; liberation (used, for example, of slaves from bondage, of a person from prejudices, of the mind from superstition, of a nation from tyranny or subjugation).

   • US President Abraham Lincoln was called the Great Emancipator after issuing the Emancipation Proclamation in 1863.