Corruption. Gilded means covered in gold, but on the inside, it was corrupted. There was economic growth, but there were political machines (industry had too much power) and lots of poverty, which lead to the rise of labor unions. For more information, check out the Wikipedia page on the Gilded Age.
I followed an oligarchy? is this 6th grade?
Explanation:
The phrase "bourgeois revolution" has been used in Karl marx to describe a socialist revolution that strives to abolish the aristocracy or its remnants, reestablish bourgeois rule, and build a bourgeois province.
The term "bourgeoisie" denoted a socioeconomic status dedicated to economic individualism and sensuality, as well as supporting the capitalist ruling class types radical commercial interests.
Well the other guys answer is technically right their a few more details to it. The league of nations was also another attempt to stop further wars between various groups in the world. They didn't want another Holocaust or world war to happen so it made it that all nations would turn on one nation or nations if they did go rogue and attack.