Good understanding of contemporary demographic structure and population dynamics underpins effective planning and decision making for the future. One of the key contributors to the development of a range of population projection methodologies over the past 40 years is Professor Phil Rees at the University of Leeds. This book contains an eclectic range of methodological and substantive contributions by a number of eminent researchers in the fields of population geography and demography that were presented at a conference to honour Professor Rees retirement. In this book different macro and micro approaches for estimating and projecting populations are reviewed, trends in the components of change in the UK (births, deaths and migration) are presented, international comparisons of internal migration are drawn, impacts of population ageing are considered and a new perspective on understanding urban evolution is offered. All these themes are interconnected in one way or another and collectively represent a compendium of the research interests of Professor Rees. The book is a celebration of a lifetime of commitment to undertaking meticulous analytical research, developing innovative modelling methods and enhancing knowledge in population geography and spatial demography.