The characteristics of Neoclassical have a massive for us on classical art of Greek and Roman times
Factory owners used child labour because, quite simply, it was cheaper. Children worked for less than adults, and their parents were often happy to send them off to work, as the lower classes did not value education. Many men lost work when machines were introduced, as machines could do more work in less time, so if the children had the opportunity to work and earn money, they did.
During this time Tammany Hall was associated mostly with "labor relations", since it was an HQ for many political leaders who met primarily in order to discuss electoral issues.
Hope this helps :D
On the political front, Americans sought to expand their role in world affairs. World War 1 also led to the rise of the “Lost Generation.” This was a generation that had become disillusioned with the ideals and values of American consumer culture and political democracy.