What two reasons does DuBois give for the ultimate failure of the Freedmen’s Bureau?

What system replaced slavery in the agricultural South for many African Americans following the Civil War?

What is a “poll tax”?

A bill passed in February 1865 established the Bureau of Refugees, Freedmen, and Abandoned Lands.  For how long was it initially supposed to stay in effect as an organization, according to DuBois in The Souls of Black Folk?

What two reasons does DuBois give for the ultimate failure of the Freedmen’s Bureau?

What problem does DuBois claim will be the 20th Century’s?