A common shortcoming in existing literature and discussions about human needs is that the fundamental difference between needs and their satisfiers either is not made explicit or is completely overlooked. It may have to do with the difference between human needs and the conventional notion of economic "wants" which are infinite and insatiable. Satisfiers may include forms of organization, political structures, social practices, values and norms, spaces, types of behavior and attitudes. For example, a house can be a satisfier of the need for protection, but a family structure as well. Also one cannot say that a need is 'satisfied' or not. It is better to say that needs are satisfied to a greater or lesser extent.