I believe they used the phrase "Manifest Destiny." In other words, they believed that it was their destiny to have the land and to build upon it.
The damage outweighed the benefits to the American people because it meant they got to "have more." In other words, more money.
The government could have made an agreement with the natives and possibly allowed them to continue living on the land, perhaps, that would have caused less wars or battles in the end.
During Stalin’s reign, schools "<span>c. taught the evils of capitalism" </span>to encourage support of Stalin and to revive Soviet nationalism, since the communist party was highly opposed to capitalism.
The Helsinki Accords was an agreement that was signed at the end of the Conference on Security and Cooperation in Europe which 35 European plus the US and Canada signed. The main purpose of the Declaration was to reduce tension between East and West, reducing Cold War tensions.