Answer:
In 1619, Dutch traders brought African slaves taken from a Spanish ship to Jamestown; in North America, the Africans were also generally treated as indentured servants in the early colonial era. Several colonial colleges held enslaved people as workers and relied on them to operate.
The black death effect society by a series of religious, social, and economic upheavals. it was one of the most devastating pandemics in human history, peaking in europe between 1347 and 1350 with 30% to 65% of the population killed.
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One factor was barbed wire. As farmers and ranchers wisened up, they used the wire to fence in their cattle, destroying the use of cowboys, and taking away one aspect of the "wide open west".
Herds of cattle took over the plains and destroyed the grass. In 1883 t big drought struck and water streams dried up and prairie fires grazed. Also the barbed wire and the natural disasters. People wanted to be able to mark their property.