Answer:
It has been 155 years. Slavery was abolished in the year 1865.
Explanation:
In the first half of the 20th century women had the advantage. They gained more expectancy than men had. While in the later part of the century men are making better gains than women and this has narrowed down the gap that was once large. In the pattern has been clear in the first half women had more and in the second half the gap in reducing.
The answer is that it established the power of the federal government. It allowed state government to overule the federal government also established the power of state government. And decided the the federal government cannot tax states.
