

The more than 43% of Black residents of King’s County who are immigrants, places it in the 98th percentile among all counties. is in the 89th percentile of life expectancy at 78.5. One standard deviation above the mean in this variable adds one year to predicted life Black expectancy.

Others were more surprising, including the top predictor of high Black life expectancy: larger shares of foreign-born Black residents.

Using a common machine-learning algorithm to select variables and rank their importance, the Index identifies 13 social conditions that predict Black life expectancy. Many are those one might expect, such as income, education, housing, and family composition. Our current life expectancy data suggest that people are breaking down specific social conditions that influence longevity, giving real reason for optimism. What accounts for such vast differences? Life expectancy, a cumulative measure of health and well-being, summarizes both the biological and non-biological influences on our lives. Because race is a sociological construct and not a biological one, we should assume disparities in life expectancy represent differences in non-biological influences on our lives. Read More: Why John Lewis Kept Telling the Story of Civil Rights, Even Though It Hurt
