They spread like wildfire. For a new factory to beat the competition, it had to be built quickly. Laborers needed fast, cheap housing located close to work. Roads would be hastily built to connect the factory with the market. There was no grand design, and consequently, the new American city spread unpredictably. Urban sprawl had begun. But the growing beast brought benefits that raised the standard of living to new heights. The modern American city was truly born in the Gilded Age. The bright lights, tall buildings, material goods, and fast pace of urban life emerged as America moved into the 20th century. However, the marvelous horizon of urban opportunity was not accessible to all. Beneath the glamour and glitz lay social problems previously unseen in the United States.
Major river valleys, where there was rich soil and rivers provided a way of transportation and irrigation for crops
The situation that would most likely demonstrate the “equity” characteristic of a good tax would be "<span>Policy-makers lower the tax rate for individuals earning income below the poverty threshold." By definition, equity is the difference between assets and liabilities that is an important aspect of taxation.</span>
This would be the definition of an obligation.