But today, DeLong writes, “less than 9 percent of humanity lives at or below the roughly $2-a-day living standard we think of as ‘extreme poverty,’ down from approximately 70 percent in 1870.” That figure is adjusted for inflation. “And even among that [poorest] 9 percent, many have access to public health and mobile phone communication technologies of vast worth and power.” We’ve turned incredible experiences into everyday features of living. DeLong writes, “So many of us have grown so accustomed to our daily level of felicity that we utterly overlook something astounding. We today—even the
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