Within this framework, Drysdale emphasizes pressing current problems: the impact of climate change in a region where some areas already suffer from extreme summer heat and aridity, the challenge of providing additional water in a region where per capita availability of freshwater is already the lowest in the world, the impact of high fertility and rapid population growth in a fragile environment where economies are often unable to absorb young workers entering the labor force, the looming prospect of an aging population, the effects of out- and in-migration, the diverse impact and role of Islam in daily and public life, the integrative consequences of linguistic and ethnic diversity, the evolution and imperfections of the political map, ongoing territorial and boundary disputes that often have global repercussions, external dependence on the region's prolific oil and gas resources, and the extreme regional inequalities associated with their presence or absence. This timely and insightful analysis is essential reading for students of the region who need a better understanding of key regional characteristics, challenges, and issues.