“There is an often quoted parable that tells of a man and woman fishing downstream. Suddenly a person comes down the river struggling for life. The fisherfolk pull her out. Then another comes who again must be rescued. This happens all afternoon and the fisherfolk are getting very tired from constantly pulling people from the river.
When they go upstream, they find that people are drawn to the edge to look at the river, but there is no safe way to do this. Many of them fall. The fisherfolk go to the community leaders and report the number of people who have fallen into the river. They also report that this is due to the lack of a protective barrier on the cliff. Community leaders build a wall behind which people may safely view the water. Some still fall, but there are many fewer victims to rescue.” (CDC, 2004; PREVENT, 2005a)