What are some of the keys to ending modern-day slavery?

From what I have read, machines will play a big role in ending modern-day slavery.

Contemporary slavery, also known as modern slavery, refers to the institutions of slavery that continue to exist in the present day.  The amount of slavery centers towards the range of 21 million–29 million to 46 million.
In order to solve it, testifying/protesting in public is an important source.
By law, we are able to rebel if the government becomes evil or rebellious to us.
Most political problems have been solved, including racial segregation, and much more historical events, so this will be a very helpful way to apply our beliefs of modern day slavery.

Hope this helps!