Answer:
Think about slavery. The average African-American will have very low morale if he is forced to work. Low morale means their work ethic will slip, and sub-par work ethic leads to sub-par product. You'll actually be saving money if you free your slaves. Rather than paying tens of thousands of dollars to buy them and then paying for all of their expenses beyond that, you'll just have to pay them monthly or weekly wages. Abolition is both cost effective and stimulating to the economy.
Explanation:
Large concentrations of individuals were more expensive to care for, especially medically. Most slave owners were primarily concerned about the so-called "wage bubble" that would burst and leave all slave owners destitute, when in reality slave owners who freed their slaves and still had some working for them as freemen flourished.
The building of temples and great cities without modern machinery, using astronomy to predict astrological cycles and plant crops and using their language to communicate and measure time are some of the Mayans most notable achievements.<span> During a 600-year period of time, which was from 300 A.D. until 900 A.D., the Mayans made many great achievements in science, communications, engineering and agriculture</span>
Between 1880 and 1900, cities in the United States grew at a dramatic rate. Owing most of their population growth to the expansion of industry, U.S. cities grew by about 15 million people in the two decades before 1900. Many of those who helped account for the population growth of cities were immigrants arriving from around the world. A steady stream of people from rural America also migrated to the cities during this period. Between 1880 and 1890, almost 40 percent of the townships in the United States lost population because of migration.
Imperialists seeked possession of colonies that had extractive economies because they wanted to gain the advantage of the global resources.