Question

why has there been a general decline in death rates throughout the world ? How has this affected the world population ​

Answer 1

Answer:

But more of this decline was attributable to medical factors, such as the use of penicillin, sulfa drugs (discovered in 1935), and other antibiotics. These help the elderly as well as the young, thereby reducing mortality across the age spectrum. By 1960, 70 percent of infants could be expected to survive to age 65.

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Answer 2

During the twentieth century, mortality rates declined quite rapidly in the United States and in all developed countries. In 1900, the annual mortality rate was one in 42 Americans. In 1998, on an age-adjusted basis, the rate had dropped to one in 125 people. That's a cumulative decline of 67 percent. In Changes in the Age Distribution of Mortality Over the 20th Century (NBER Working Paper No. 8556), co-authors David Cutler and Ellen Meara explore how we achieved such gains in health: that is, which innovations or policies contributed most to these gains.

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