"Is [the U.S. Agency for International Development] a good use of resources?" James Macinko, a health policy researcher at UCLA, asked in an NPR interview this month. "We found that the average taxpayer has contributed about 18 cents per day to USAID." That "small amount," Macinko estimated, had prevented "up to 90 million deaths around the world." Macinko was referring to a study he coauthored, which was published in the prestigious medical journal The Lancet. In addition to estimating that USAID programs had saved 90 million lives from 2001 to 2021, Macinko and his colleagues project that if the Trump...