Modu Churi, who fled his village to escape the militant Boko Haram group last year, now earns a living by charging cellphones for displaced persons in northeastern Nigeria.
Jide Adeniyi-Jones for NPR
A worker stands in a construction project in a favela, or shantytown, in Rio de Janeiro, Brazil. The government has helped drive down income inequality by investing in basic services like health care, education and pensions.
Mario Tama/Getty Images
Some workers in low-income countries are choosing bitcoin, a virtual currency powered by blockchain technology, to send money to their families. It's cheaper, faster and doesn't require a middleman.
Andrew Baker/Getty Images/Ikon Images