Disease had the most impact as the result of Columbian exchange because due to this exchange deadly diseases spread across all over the world with the travel and migration of people.
Columbian exchange was as exchange of plants, animals, humans, culture, disease, technology and other things to the Africa, America and many other countries. The Columbian exchange had negative as well as positive impact on both the continents.
Impact on Europe:
This exchange benefited the old world with the introduction of "new world crops" such as corn and potatoes. This exchange had negative impact as well. The transmission of epidemics and African people into slavery were some of negative impacts of Columbian exchange.
Impact on America:
The technology helped in advancement in agriculture and food cultivation while the exchange of disease increased the mortality rate among the Americans.
Answer:
If those things come to pass in other parts of the world, let no one imagine that America will escape, that it may expect mercy, that this Western Hemisphere will not be attacked, and that it will continue tranquilly and peacefully to carry on the ethics and the arts of civilization. If those days come, "there will be no safety by arms, no help from authority, no answer in science. The storm will rage till every flower of culture is trampled and all human beings are leveled in a vast chaos."
Explanation:
During the post-war period, the USSR was able to control Poland and Hungary by means of installing puppet governments and keeping Soviet troops stationed in those countries among other means.
They claimed to be direct descendants of war god.
