Books have published for decades predicting imminent global disaster due to overpopulation. (According to the 1972 "Limits to Growth" we should already be witnessing the collapse of civilization.) What makes this time different is that there is increasing evidence that we are coming up against some hard limits with regard to natural resources. Obviously, population cannot continue growing forever. It's better not to be overly doom-and-gloom, but we need to take intelligent measures to limit population growth and reduce our usage of natural resources, so that we can at least reduce the suffering.
Ummm, er, maybe in 1972 they were right?
I get really tired of people who obviously haven't read LIMITS TO GROWTH" making up quotes from it.
The politest response I can give you is that if you don't know what Limits to Growth actually said, then stop making up falsehoods and passing them off as your wisdom. If you read Limits to Growth and then the 30 year update to the same, you'd realize that we are almost dead on target for the Club of Rome's predictions.

P.S. The Limits to Growth gave modern society a lifespan of about 100 years starting from its own publication, so we're talking about a collapse near 2070, not one that was supposed to have happened already.