Lilongwe, Malawi – In the rural valleys of Malawi, where homes are built of mud and grass, and electricity is scarce, Tamala Chunda spent his evenings bent over borrowed textbooks, reading by the dim light of a kerosene lamp.

During the day, he helped his parents care for the family’s few goats and tended their half-acre maize field in Emanyaleni village, some 400km (249 miles) from the capital city, Lilongwe. By night, he studied until his eyes stung, convinced that education was the only way to escape the poverty that had trapped his village for generations.

That conviction carried him through his final examinations, where he ranked among the top 10 students in his secondary school.

Then, this May, a letter arrived that seemed to vindicate every late-night hour and every sacrificed c

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