The correct answer to this open question is the following.
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Pyramids were the first engineering marvel seen in history.
The reason why is that Pyramids are the oldest constructions known to archeologists, scientists, and historians. There are pyramids, like the Egyptian Pyramids in Giza, Cairo, that had been dated from thousands of years before Christ. Modern research affirms that the pyramids could be older than mainstream science has established.
Architects admire the mathematics and engineering knowledge of ancestral Egyptians who were able to build those magnificent pyramids without the technology needed to build them. Even today, those pyramids are impossible to build. That is why these pyramids remain a mystery.
The Crusades were a series of religious wars sanctioned by the Latin Church in the medieval period. The most commonly known Crusades are the campaigns in the Eastern Mediterranean aimed at recovering the Holy Land from Muslim rule, but the term "Crusades" is also applied to other church-sanctioned campaigns
Answer: Efforts by representatives of one ethnic or religious group to remove or destroy another group in a particular geographic area. multiculturalism A pattern of ethnic relations in which new immigrants and their children enculturate into the dominant national culture and yet retain an ethnic culture.
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Albeit this is a basic answer, World War Two was a major catalyst to an increased focus on internationalism. In addition, financial and political interests (most notably for political interests is the Cold War) are both legitimate reasons to why the United States of America has remained as a major part of international affairs.