English bill of rights to create American bill of rights
OR
The Magna Carta which limited the kings power, which is similar to the separation of power and the philosophy of limited government here in the U.S. today.
<span>The first organized opposition to slavery as an institution emerged in the late "18th century," since it was during this time that small organizations were formed--although opposition had been around for many years prior. </span>
Idk if this is the event its asking for but: The “Red Summer” of 1919 marked the culmination of steadily growing tensions surrounding the great migration of African Americans from the rural South to the cities of the North that took place during World War I.