Slavery was justified by saying that it was 'natural' or 'beneficial' and that it was part of gods plan and to interfere was wrong. Also, people thought that slavery taught people how to live their lives if they thought they lacked the ability to. Mainly also because it was legal, however this is not a very good argument because it can be legal but unethical. Abolishing slavery would threaten the structure of society is another good point.
Answer:
It is believed Columbus found America but it was actually Leif Eriksson
Answer:
Since Columbus discovered America in 1492 many European sailors tried to reach Asia by sailing towards the west and that is why one of their goal was to reach it by sailing towards the North. They weren't successful at the beginning because the weather condition and the conditions of sailing were bad and they weren't able to reach Asia through that route until 1906 when Roald Amundsen somehow managed to navigate this route.
Explanation:
Among the first Europeans who tried to find this passage were famous explorers, including John Cabot and Jack Cartier, but they both failed. It just proved the fact that it was practically impossible at the time to use this route.
The Great Plague transformed Europe because it caused people to be very cautious not to catch the deadly disease and later on, it killed thousands of people which made some people feel lucky to be alive. This also has made an impact on history because this is such an important time that we hear about and we find it very interesting that a sickness could have killed thousands.
Hope this helps!!!:)