The Netherlands’ Catholic Institute for Social-Ecclesiastical Research has launched a $5,000 prize contest to find new ways to control the fast growing world population.

By 1980, the U.N. estimates, there will be from 34% to 63% more people on earth than in 1950. To some this suggests the need for birth control. The Roman Catholic Church teaches that any mechanical interference with the consequences of sexual intercourse is a mortal sin. But The Netherlands’…