Overpopulation –>
– The problem of hunger
– Poverty in "developing countries"
– The crime rate
– Child abuse
– Destruction of biodiversity
– Depletion and pollution of drinking water
– Urbanisation and land sprawl
– Deforestation to make place for arable land
– Desertification of formerly arable land
– Depletion of unrenewable resources
– Global warming of the atmosphere
– Increase of weather disasters
– Destruction of the protective ozone layer
– The pollution of the air we breathe
– Overfishing and pollution of the oceans
– The problem of human migration
– War between people who believe in different, but always human-like creators of the universe

The one common denominator is the relentless population growth, protected by a taboo.