This publication is a timely contribution as it addresses the mounting unmet demand for housing that stems from the almost global absence of government interventions since the 1990s. During the last few years, the international community has joined hands to articulate and formulate major goals, agendas and strategies. These 15-to 20-year perspectives set the backdrop against which key actors, including governments, academia, professionals, developers, civil society and the private sector, should further develop them into programmes, interventions and actions on the ground.Challenges: Access to affordable housing globally is becoming more and more elusive to large numbers of urban populations. As many cities mature and expand, affordable land for housing becomes increasingly scarce and costly and thereby beyond the reach even of the middle class. In most developing countries, housing demand, from the rapidly growing lower and middle-income group, is neither met by the public sector (national and local authorities) nor by the private sector (the forces of the market). Planning the development of affordable serviced land and housing as well as providing financial and mortgage schemes are either absent, undeveloped or, if they exist at all, they do not target the informally employed lower-income groups.Government responses: Over the last 60 to 70 years, housing policies have shifted the roles of the public sector from direct delivery by the central government to a laissez-faire role that is limited to enabling the market. Only in rare situations has the market worked and, even then, there has had to be some support to vulnerable groups through social and financial programmes. The private sector, in the majority of cases, favoured earning rapid high profits by focussing on housing for higher income groups that could buy housing units thus enabling 1 This Keynote was delivered at the 19thN-AERUS conference on "Housing and Human Settlements in a World of Change", held in Stuttgart 8-10th of November 2018.