I would argue that John Locke had the most direct influence. Locke believed all men were born a "blank slate" and were shaped by their experiences. The Declaration declares similarly that "All men are created equal".
Assuming you're referring to the Palestine Riots of 1929, the best option would be "religion," since the main cause was a rivalry between Muslims and Jews of access to the West Wall.
They are both peaceful protests
The Democratic Party asserted dominance in the South after the Compromise of 1877 which effectively ended the Reconstruction and the Republican rule in the South. The promises the Democrats made, to protect and respect the rights of the African American people were not kept and through a series of Jim Crow laws they tried to maintain the control over the black population.
