From grassroots organisers to Martin Luther King, leaders framed their struggle in global terms, writes Keisha N. Blain https://www.economist.com/by-invitation/2026/05/07/the-civil-rights-activists-planned-to-change-the-world-not-just-the-country?taid=69fcb83c4cec6400016014ec&utm_campaign=trueanthem&utm_medium=social&utm_source=voante