NO
"Tear down this wall", also known as the Berlin Wall Speech, was a speech delivered by United States President Ronald Reagan in West Berlin on June 12, 1987. Reagan called for the General Secretary of the Communist Party of the Soviet Union, Mikhail Gorbachev, to open the Berlin Wall, which had separated West and East Berlin since 1961.[1][2] The name is derived from a key line in the middle of the speech: "Mr. Gorbachev, tear down this wall!"
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The word most commonly used to <span>describe crowded, poorly constructed or poorly maintained urban apartment buildings would be "slums," since people are often forced to live in such conditions because they lack the means to move elsewhere. </span>
Answer:
It depends on what you have been taught, but I would personally say negative because of the diseases that destroyed Native Americans and the rise of slavery.
On the flip side, if you're thinking of positive, it did help exchange new ideas and goods (the Columbian Exchange) between the worlds. It also allowed a safe haven for those persecuted (like the Protestants) and allowed countries to dump their inmates onto the new land.