I'm not apocalyptic, I'm just making observations, and they don't really scare me, proof that my own social bubble functions pretty well, although I myself am not an American dreamer. I too find many bleak predictions of the future silly in their choice of resentation, although some people's desperation may be warranted if they take their observations seriously.
I'm not saying humanity can't adapt, or that nothing will be done to prevent disasters should they arise (nor am I saying a global crisis will be the doom of mankind and humanity), but it's always wiser to judge objectively and in advance wether threats exist, and if they do (and they do), prepare for them when you can still do it casually.
Perhaps for you it's not as striking that developed countries, with economies based on services, finances, commerce and technology live off of cheap raw resources from less developed or third world countries; that countries such as Belgium and Japan, with a staggering population density of over 300 citizen/ square kilometer have to import about three quarters of their food. What will happen to these countries if the ratio of gains from their specific export branches and prices for food from the ever developing (and less agrar) countries from which they import will change against their favor? Or if climatic changes limit the global organic resources?
What will happen, for the matter, when the waters of the Indian ocean supplying the like-named coutry with resources of marine nourishment, will fail to reproduce enough fish and crustaceans to supply both the demand and the necessary gene pool for certain species to survive. Unlike us, the animals we pull out of their ecosystems in order to eat something exotic and spicy which we pay for with money from our very Earth-sustaining job in PR, do not experience a growth in numbers proportional with the demand.
The world population has increased with prosperity? The world popyulation grew to less than two million from prehistory to the begining of the 20th century, and in the following hundred years it reached six and a half, of which four million just under the second world war, during the propagandistic conflict between the democratic west and communist east, locked in a contest of growth. Such a jump in human population is unprecedented, and it has come with massive deforestations, pollution, endangering of animal species, massive consumption of subsoil resources, and a sense of global awe of what will actually happen if a large scale crisis were to arise today, which luckily halted the thirst for armed conflicts between the great geopolitic powers... to some degree at least. It's scary that you, citizen of one such great power, are not at all concerned with how things evolved in the last decades and where they may lead. I'm not saying scared, but concerned... anything but derisive. How the large population helped prosperity I will really, really want to hear.