Mercy Otis Warren was an American writer, who had frequent letter exchanges with many politically powerful people.
33rd American President was Harry S. Truman
<span>Since the beginning of the age of the Enlightenment and over the course of modernization, the mortality of children below 5 years of age has declined rapidly. Child mortality in rich countries today is much lower than 1%. This is a very recent development and was only reached after a hundredfold decline in child mortality in these countries. In early-modern times, child mortality was very high; in 18th century Sweden every third child died, and in 19th century Germany every second child died. With declining poverty and increasing knowledge and service in the health sector, child mortality around the world is declining very rapidly: Global child mortality fell from 18.2% in 1960 to 4.3% in 2015; while 4.3% is still too high, this is a substantial achievement.</span>
Answer:
according to me it's due to climatic changes..
The First.
Second they never got there. Third one detachment went that way but similar end.