Give Me Sanctuary!

Analogy-

Mom and Dad owned lakefront property.
A breeding pair of Canada Geese started feeding on their land. Mom and Dad, (wildlife lovers), thought they were beautiful, and bought a 
50-lb bag of cracked corn to entice the geese to stick around. It worked. The breeding pair hatched a brood of 8 goslings and Mom and Dad enjoyed watching the family thrive and grow.
Winter came, and all the geese flew to warmer climes.

Next Spring, Mama and Papa goose came back. The eight goslings also returned, bringing their mates with them... eighteen birds in total.
Mom and Dad bought more cracked corn. By mid-summer they, retired and on a limited budget, became pretty vocal about the cost of feeding their adopted, feathered friends.
Mama and Papa goose and all the other gooses had broods of 6-8 goslings. Dad watched as an adult from one family attacked and drowned one of the little ones from another family.
What uncivilized behavior! This, and the fact that their waterfront was now covered in goose excrement, began to give them concern.
Winter came. Geese departed. Spring returned.
And so did ALL the geese.
It was impossible to count them all.
Mom and Dad called the State Department of Natural Resources.
No one knows how they did it or what they did, but the geese disappeared.
And Mom and Dad's retirement funds were no longer spent on cracked corn.

Psychology and Sociology 101:
You get MORE of what you reward.
We must insure that we reward behavior that makes the world a better place.