What was america feeling after the events of the 1910s

All the events of the 1910s were interconnected. America benefitted a lot politically.  

Explanation:

The period of 1910s was full of turmoil and unrest. After the assassination of the Austrian - hungary Archduke in 1914, each country declared wars against one another. America signed a treaty with Germany compelling it to stop the use of U-boat however, Germany later broke this treaty.  

The most crucial change during the 1910s was that US emerged as a world power. African-Americans gained better recognition which gave rise to other hopes.

the constitution gives congress the power to regulate commerce "among" the several states.