...the "development that meets the needs of the present without compromising the ability of future generations to meet their own needs."
- Bruntland Report for the World Commission on Environment and Development (1992).
People includes aspects such as basic human rights, labour rights, social responsibility, community development, etc.
Planet addresses the rates of renewable resource harvest, pollution creation, and non-renewable resource depletion that can be continued indefinitely.
Prosperity focuses on the ability to support a defined level of economic production indefinitely.