Yes , the "elephant in the room" in hunger, global warming, extinction of species, destruction of rain forest etc is the huge increase in the world population. In many countries the population growth exceeds the capacity to increase food production. I read somewhere that the UK , to be self sufficient, should have a population on no more than 30 million. Of the big countries only China (with much criticism on human rights) has a realistic population control. Until this issue is put at the top of every country's agenda, however unpopular it may be with church leaders, etc.,I see no chance of the situation improving. How this could be done is a huge and maybe impossible question.