NELSON Mandela was a famous advocate for the value of education. In 1990, the man who would become South Africa’s first democratic president four years later told a high school in Boston: “Education is the most powerful weapon which you can use to change the world.” NATASHA JOSEPH, Commissioning Editor, The Conversation The United Nations agrees. In 2018 its General Assembly adopted a resolution that proclaimed 24 January as the International Day of Education. It’s an annual opportunity to shine a spotlight on the role that education can and should play in promoting peace and development. This year the theme…