Sustainable Development Simulation (SDSIM) is a System Dynamics model, and it is programmed in the STELLA simulation language. The objective of the SDSIM is to analyze trade-offs between human development and economic development priorities. It is a global model, in the tradition of Limits to Growth and other similar projects. However, it attempts to take into account both material resources, which are limited, and human resources such as human wisdom, which are unlimited. The time window is 1950-2200, and the transition from consumerism to sustainability is expected to happen during the 21st century (i.e., approximately 2010-2100).