"The dismantling of Reconstruction is one of the saddest and darkest periods in American History. Why do you think it
is important that students in America learn about this truth?

Learning from the past is the best way to prevent it in the future.

Explanation:

History tends to repeat itself.

Here's The History Teacher by Billy Collins

The History Teacher

Trying to protect his students' innocence

he told them the Ice Age was really just

the Chilly Age, a period of a million years

when everyone had to wear sweaters.

And the Stone Age became the Gravel Age,

named after the long driveways of the time.

The Spanish Inquisition was nothing more

than an outbreak of questions such as

"How far is it from here to Madrid?"

"What do you call the matador's hat?"

The War of the Roses took place in a garden,

and the Enola Gay dropped one tiny atom

on Japan.

The children would leave his classroom

for the playground to torment the weak

and the smart,

mussing up their hair and breaking their glasses,

while he gathered up his notes and walked home

past flower beds and white picket fences,

wondering if they would believe that soldiers

in the Boer War told long, rambling stories

designed to make the enemy nod off.

i think it would be reparing roads  

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts