Answer:
Explanation: After being considered inferior beings to whites and being subjected to slavery in earlier times, the lives of African Americans gradually changed for good, especially since the Third Amendment was promulgated in December 1865, where abolition was established of slavery in most states of the country. In the same way it happened with the Fourteenth Amendment where said population was obtaining benefits such as US citizenship. Continuing with the fifteenth amendment, which promulgated the right to vote to the African-American population. All these were positive factors that improved their quality of life notoriously.
3D printing uses computer-aided design (CAD) to create three-dimensional objects through a layering method. Sometimes referred to as additive manufacturing, 3D printing involves layering materials, like plastics, composites or bio-materials to create objects that range in shape, size, rigidity and color.
Erik the Red. Erik the Red, byname of Erik Thorvaldsson, Old Norse Eirik Rauð, Icelandic Eiríkur Rauði, (flourished 10th century, Norway?), founder of the first European settlement on Greenland (c. 985) and the father of Leif Eriksson, one of the first Europeans to reach North America.
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In his book "Looking Backward", Bellamy tells the story of Julain West, a young American who lived in Boston towards the end of the 19th century (1887). During this period, industrialization was affecting all economic activities, as developments made manufacturing sites more productive and there was also a growing need for a labor force, as the growth of industry was exponential. Throughout all of this process, owners of these businesses were getting very rich.
One night, Wells falls asleep and wakes up 113 years later. He sees Boston as a city who suffered a dramatic change. Technological developments could be seen everywhere. He later learned that the country had adopted a socialist model which was fully executed. Enterprises were run and organized by a central office and labor was distributed by an organization called "The industrial army", who effectively assigned labor resources among the industries.
The book had great reception. Bellamy was praised by many unions, including the American Federation of Labor and The Knights of Labor, which saw the book as a reference on how industrial matters should be managed in the country.
All of these presidents were in office during a war.
