why did most americans lose interst in reconstruction in the 1870s?

Answer 1

Violent controversy arose over how to accomplish those tasks, and by the late 1870s Reconstruction had failed to equally integrate the Freedmen into the legal, political, economic and social system. "Reconstruction" is also the common name for the entire history of the era 1865 to 1877.

Answer 2

Reconstruction was about punishing the South.
The north had there feel of it by 1870.

Answer 3

because not many mexican decents were here