How did slavery change over time? What were some of the causes of these changes?

The 13th Amendment, adopted on December 18, 1865, officially abolished slavery, but freed Black peoples’ status in the post-war South remained precarious, and significant challenges awaited during the Reconstruction period.

Previously enslaved men and women received the rights of citizenship and the “equal protection” of the Constitution in the 14th Amendment and the right to vote in the 15th Amendment, but these provisions of Constitution were often ignored or violated, and it was difficult for Black citizens to gain a foothold in the post-war economy thanks to restrictive Black codes and regressive contractual arrangements such as sharecropping.

Despite seeing an unprecedented degree of Black participation in American political life, Reconstruction was ultimately frustrating for African Americans, and the rebirth of white supremacy—including the rise of racist organizations such as the Ku Klux Klan (KKK)—had triumphed in the South by 1877.

Almost a century later, resistance to the lingering racism and discrimination in America that began during the slavery era would lead to the civil rights movement of the 1960s, which would achieve the greatest political and social gains for Black Americans since Reconstruction.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."