needs
douglas nuttall comments on it:
And I would add to what those authors have said:
People will automatically seek to meet their needs unless they are obstructed from doing so.
People meet needs through actions
Meeting needs prevents the degradation of the individual, family, or community
Unmet needs produce symptoms
A universal symptom of unmet needs is chronic stress
A proxy measure for Quality of Life can be taken as the time available after needs are met - eg, the time available to meet wants. 2 values can be calculated to bracket the range - how much time is available for meeting wants, and how much time would be available if all needs were met.
see also: offers and needs market by post-growth institute.