Which group became the main residents of the inner city during the gilded age?

The group became the main residents of the inner city during the Gilded Age are the working poor. The Gilded Age is characterized as the time between the Civil War and World War I amid which the U.S. populace and economy developed rapidly, there was a considerable measure of political debasement and corporate budgetary misdealings and numerous well off individuals lived extremely favor lives.