James Mwangi, CEO of Equity Bank, has transformed lives and livelihoods throughout East and Central Africa by giving impoverished people access to banking accounts and micro loans. He’s been so successful that in 2020 Forbes coined the term “the Mwangi Model.” But can we really have both purpose and profit in a firm?

Harvard Business School professor Caroline Elkins, who has spent decades studying Africa, explores how this model has become one that business leaders are seeking to replicate throughout the world in her case, “A Marshall Plan for Africa’: James Mwangi and Equity Group Holdings.”As part of a new first-year MBA course at Harvard Business School, this case examines the central question: what is the social purpose of the firm?