What challenge to the US will have the greatest impact on our future?
The biggest challenge to the US in the foreseeable future is globalization. The United States needs to find a way to deal with the huge increases in global economic competition that face us. We have to find a way to make our economy grow and to create jobs that will allow all Americans (including those without a lot of education) to have a decent standard of living. The way we respond to this challenge will impact us immensely because it will have an effect on how prosperous we are and how stable we are politically (because a country that cannot provide decent jobs to its lower classes might well experience political unrest).