This module was designed to introduce to you the idea of development, including sustainable development, and give an overview of development around the world. Development is a complex and contested concept, lacking a single universally accepted definition. But we can still recognize some general features of development, whether measured via monetary, health, end uses, or other indicators. We can see that today the world is unevenly developed and that this contemporary pattern is not solely determined by the natural environment but the product of both social and environmental factors that have been going on throughout human history. It is this development that enables us to enjoy the comforts and conveniences of our time and place, such as the opportunity to take online courses. But development has its downsides and, for better or worse, these downsides frequently affect the nation's and the world's poorest and least powerful. Finally, our contemporary development depends on certain natural resources that will not last forever, raising questions about the sustainability of our development.