C. Civil War because world war 1 & 2 were in the 20th century
Polygamy is having more than one wife or husband at once, and anarchism is the rejection of the state or any other type of authority when organizing human societies.
Both types of behaviour are frowned upon by our society, to the point that they can be considered taboo. A taboo is an implicit (although sometimes it can be explicit, like through the enactment of a law) prohibition of something, because it is believed that the act goes against the agreed cultural or religious beliefs of a community. Establishing those kind of limits helps communities to be more organized and to have a stronger sense of "belonging." On the other hand, it can isolate those who think differently and cause the community to be closed to new ideas.
Produced the steam engines which then improved systems of transportation. For example, trains were essential, but relied on burning coal. The steam engine made it more efficient. For the textile industry, the sewing machine was introduced to production lines, helping the processing and usage of cotton to be more efficient.
