improving public policy has for the last two decades been the most comprehensive textbook on this topic on the African continent. This new edition has been reconceptualized by an expanded range of experienced specialists to clarify the most pertinent public policy issues in contemporary 21st century societies. Sustainable development is nowadays an overriding goal for any government. It is a much taller order than only ‘simple’ short-term economic development or medium-term improvement in the quality of life of people. Sustainability is a very complex, comprehensive, long-term outcome that requires much more sophisticated planning, policymaking, management and governance than simpler, narrower goals. This is especially relevant in the current digital era of the so called Fourth Industrial Revolution.