Columbia subject headings:
Harvard subject headings:
Harmony (Philosophy)--Forecasting.
Harmony (Philosophy)--History--21st century.
Human comfort--History--21st century.
Human comfort--Philosophy.
Interpersonal relations--History--21st century.
Interpersonal relations--Philosophy.
Quality of life--Forecasting.
Quality of life--Philosophy.
Relationship quality--History--21st century.
Relationship quality--Philosophy.
Twenty-first century--Forecasts
Princeton subject headings:
Harmony (Philosophy)--Forecasting.
Harmony (Philosophy)--History--21st century.
Human comfort--History--21st century.
Human comfort--Philosophy.
Interpersonal relations--History--21st century.
Interpersonal relations--Philosophy.
Quality of life--Forecasting.
Quality of life--Philosophy.
Relationship quality--History--21st century.
Relationship quality--Philosophy.
Twenty-first century--Forecasts.