Philip Kreager is a historian of population thought and analysis, and an anthropological demographer specializing in Indonesia. He is Senior Research Fellow in Human Sciences, Somerville College; Director, Fertility and Reproduction Studies Group (FRSG); Emeritus Lecturer and Tutor in Population at the Institute of Human Sciences; and Research Associate in the Department of Sociology, Oxford University. Dr Kreager’s Indonesian research began in the design and implementation of Ageing in Indonesia, a multi-site anthropological demography and ethnography of ageing in three Indonesian communities (1999-2007) in collaboration with Dr Elisabeth Schröder-Butterfill. Funded in its initial nine year phase by the Wellcome Trust, this research expanded to cover eight further sites under three further grants: the study of malaria treatment-seeking behaviour in Alor, in the Eastern Archipelago of Indonesia (2013-2015) funded by the Wellcome Trust - ISSF grant scheme (Oxford University)); 'Understanding Social, Economic and Health Vulnerabilities in Indonesia 2017-2023' under Australian Research Council Discovery Grant DP170101044; and, under the direction of Elisabeth Schröder-Butterfill, ‘Care Networks in Later Life: A Comparative Study of Indonesia, 2020-2023, funded by the’ Economic and Social Research Council. This work has led to collaboration with the University of Indonesia, where he is Honorary Professor. Dr Kreager has a primary interest in the history of population thought, particularly as a common ground of theory and analysis linking the biological and social sciences, and in this connection was senior editor, Population in the Human Sciences (Oxford University Press, 2015). His Directorship of FRSG has involved him in planning courses for the Medical School on cross-cultural issues of reproductive health and IVF, and of workshops on AIDS, ecological and social implications of genomics, the diversity of fertility declines, and related health topics.