Territorial behaviour among various herders and hunter-gatherers has been discussed in earlier studies, but this is the first time that a comparison of these three types of mobile populations has been attempted. The original papers presented in this volume discuss the conditions and problems of securing access to resources among pastoralists, peripatetics, and hunting, gathering and fishing communities in Africa, Asia, Europe and the Middle East. A comprehensive introductory chapter places these empirical studies in a broader theoretical context of the behaviourial sciences.