There's not just one big problem - there's millions (perhaps billions) of one big problems, depending on who's doing the asking and who's doing the answering. Sure, there are a few common problems that could be solved, but you have to figure out a way to ask the questions about the problems in such a way that the solution will be mutually agreeable to the largest number of people.
Energy, food, war, socks. All of these are big problems (OK, not so much with the socks) that won't be solved with one big solution. By the time you're done breaking them down into solvable units, some wierdo will come along and ask "So, what's the biggest problem?"
Its equal access to opportunity. Population would not be a problem, given level of education has a direct correlation to number of children. And there is more than enough food to sustain the planet
population growth. It drives hunger, unemployment, pollution, resource exhaustion, political instability,.... In systems terminology it is a control variable with many output variables.
unethical businesses - Why? Because they do anything for money. They don't care about effects to the environment, they don't value human life and they treat employees as slaves (might not be same everywhere).
There's not just one big problem - there's millions (perhaps billions) of one big problems, depending on who's doing the asking and who's doing the answering. Sure, there are a few common problems that could be solved, but you have to figure out a way to ask the questions about the problems in such a way that the solution will be mutually agreeable to the largest number of people.
Energy, food, war, socks. All of these are big problems (OK, not so much with the socks) that won't be solved with one big solution. By the time you're done breaking them down into solvable units, some wierdo will come along and ask "So, what's the biggest problem?"