God-Emperor
Deity
Estimates are that we could easily support everyone at a lifestyle similar to what we have but with a lot less waste. Th comment used was something like everyone on the planet could live on a quarter acre block per family with a three bedroom house, electricity, et al and inside the area of Texas (the second biggest state in the USA). I think Texas is a bit bigger than Tasmania the smallest state in Australia.
That would be estimates made by stupid people who can't do math repeated by people who are too foolish to even try to do the math to see if it is true.
Surface area of Texas = about 171,079,000 acres.
Population of the Earth = about 7.2 billion.
Surface Area per Person = just about 0.0238 acres, which is about 96.2 square meters, and which is a lot less than the area suggested unless your family consists of an average of 10.5 people sharing those 3 bedrooms, which seems excessive - somebody's probably going to be sleeping on the couch.
Each person gets a plot of land that measures 10 meters by 9.616 meters. Almost half of the people's 10 by a bit under 10 meters are located in the desert, since just about half of Texas is desert. Good luck with that. I live in Texas, in a non-desert part. It gets pretty miserable in the summer where I am, and more so if you are near the Gulf coast where it is often both excessively hot and excessively humid. That can be worse than the deserty parts.
Oh, and they mostly die in a matter of days. That is because you have not allocated any space for roads, or grocery stores, or sewage plants (vast quantities of sewage), or electrical power plants and substations (for which you'd need to build a lot of nuclear power plants as nothing else could reasonably cope, but they could be outside of Texas - perhaps just over on the other side of the Rio Grande in the now uninhabited Mexico, since many parts of that region just south of the river are not well suited for growing food), or anything else that would be necessary to support all those people. There is also nowhere near enough water in the area for all of them. For combined consumption and hygiene purposes you want at least 20 liters per day per person. That represents the equivalent of about 10% of the average flow of the Mississippi river down near New Orleans that would need to be diverted, treated, and delivered. And it does not include anything for doing laundry or washing anything but your body and that only to a basic degree (not a bath or shower, just a damp cloth). So you'd probably want at least 25% of the Mississippi so you can maybe flush the toilet more than once per day, do a little laundry, and take a 3 or, luxury of luxuries, 4 minute shower from time to time (a low flow, but not completely stingy, shower head is about 8 or 9 liters per minute in flow rate).