This has been stated in several ways for over 100 years by various indiviuals, including (but not limited to) Churchill, Pope John Paul II, Dostoyevsky, Truman, etc.
Very recently by Cardinal Roger Mahony (1998): "Any society, any nation, is judged on the basis of how it treats its weakest members ; the last, the least, the littlest."
And perhaps most dubiously attributed to Ghandi: "The greatness of a nation and its moral progress can be judged by the way its animals are treated. "
The original author of this quotation seems to have been lost.
"The true measure of any Society can be found in how it treats its most vulnerable members."Ghandi
He treats them with respect, and teaches them how to be useful and contributing members to the society at the time.
The most similar quotation related to your question is this one: "The measure of a society can be how well its people treat its animals." (Mohandas Gandhi)
Karl Marx: "Social progress can be measured by the social position of the female sex."
He wrote this because he wants to show everyone that greatness isnt measured by your society or your richness. Its measured by the care you show to others
The dragons in DragonVale are leveled up by feeding. There is no difference between species, only by how many treats they have been given.
Mahatma Gandhi, I believe.
John Paul II in 2000. "Another key element of human ecology is the inviolability of human life, especially at its beginning and its end. The Holy See insistently proclaims that the first and most fundamental of all human rights is the right to life, and that when this right is denied all other rights are threatened. The assumption that abortion and euthanasia are human rights deserving legislative sanction is seen by the Holy See as a contradiction which amounts to a denial of the human dignity and freedom which the law is supposed to protect. A society will be judged on the basis of how it treats its weakest members; and among the most vulnerable are surely the unborn and the dying."
Societal health deals with the how well a society treats its citizens. It focuses on the availability of goods and services to every member of a society.