<span>The Vietnam War had far-reaching consequences for the United States. It led Congress to replace the military draft with an all-volunteer force and the country to reduce the voting age to 18. It also inspired Congress to attack the "imperial" presidency through the War Powers Act, restricting a president's ability to send American forces into combat without explicit Congressional approval. Meanwhile, hundreds of thousands of Vietnamese refugees have helped restore blighted urban neighborhoods.</span>
Economic factors , nationalist factors
A severe water crisis looms over India. ... A shortage of water will not only deprive millions of their means of earning a living but also it will result in severe foodgrain shortages, which would in turn trigger spikes in food prices, and also deepen India's problems of hunger and malnutrition.
The South was crippled. Once Abe Lincoln took slavery in certain parts of the south. There economy dropped because the people there thrived on selling slaves based on their height and brute agility. Also they needed slaves to plant crops and do much percentage of labor. No slaves, no profit or gain. This was Abraham's own strategic plan to not completely break the south, but cripple the economy to weaken them during the war.
