The overall aim of the liberal reforms of 1800s was to eliminate corruption in both big business and in the government. Although they weren't very successful, they brought awareness.
It would be the Grand Canyon and Pelican Island that are attributed to the efforts of President Roosevelt, since he was one of the very first presidents to make conservation a prominent issue.
WW2 would be your answer
Because of WW2, many countries that used to be colonies wanted independence after Japan was defeated
hope this helps
It is because <span>Congress has authorized the use of military force without the support of the president.</span>
