Answer :

the rise of the knight of labor led to the widespread circulation of free silver coinage in the late 1800s

I believe the answer is: The rise of the Knights of Labor led to support for a national populist political party in the late 1800s.

The knight of labor was an organziation that was initially established to protect members from employer retaliations.

The concept that introduced by the knight of labor inspired the populist movement which advocated for legislation that benefited farmers and low wage workers.