Quality of life:
What exactly is quality of life? Is it determined by the size of a bank account? The number of letters behind one's name, possibly it is the amount of sleep averaged each night? What if it had something to do with walking barefoot outside or the smell of oak wood burning in a wood stove? Another indicator might be the variety of natural nutritional options one has? Quality of life is a mix of all of these components. To really grasp the concept of quality of life the essential ingredients should be identified.
To define the basic components means defining what is essential for life. That part is easy. Humans require clean air, clean water, healthy nutrition, sometimes clothes, and interaction with other social animals. Social animals do include other humans.
What defines clean air? The coal miners of West Virginia and Eastern Kentucky used a canary as their indicator for ...