This article concludes the special issue on the history of humanitarian aid by reflecting on the role of memory and history in relation to humanitarian aid. To address a special issue as a conclusion is to embrace the opportunity to reflect on its papers, aims and ambitions. It is also for us an opportunity to reflect on the role history has for a community of practice often forging ahead in response to the latest demands and emergencies. Historical thinking is now coming into greater salience for the world of humanitarian aid because, we argue, the ‘humanitarian sector’ has grown and aged – and professionalized and institutionalized.