According to the United Nations Development Program's 2019 Human Development Index, the average life expectancy at birth in the US (both sexes, average) is 78.9 years.
Life expectancy in the US has increased by just under a decade since 1950, when it was 68.14 years. However, in the last few years, life expectancy has actually declined slightly in the US. Contributing factors include obesity and related diseases, opioid abuse, and suicides.
This question asks: Before January 1 2040, will US life expectancy at birth (average for both sexes) fall below 75 years, according to the CDC, World Health Organization, or the United Nations?
Only one of these organizations need credibly report that the US life expectancy has fallen below 75 for a positive resolution.