Global warming during the next 30 years will have dramatic effects on food supplies due to droughts and floods and the need to relocate crops and people on higher ground and /or nearer the poles. Fossil fuel will have been exhausted. Unless substantial numbers of people die due to natural disasters there will be mass migrations. This will further restrict the amount of land available for agriculture.
HG Wells has been lauded for his foresight into future events - in time the writer of Soylent Green will get the same - sad isn't it?
Soylent Green - Wikipedia, the free encyclopedia