The conventional wisdom is that outsourcing to places like China is the biggest threat to American jobs.

And while that's definitely true, there's a new threat on the horizon.

As it expands out from its online bookstore roots, Amazon has approached virtual monopoly status - and regular retailers are paying the price.

JC Penney, for example, will soon close 138 stores nationwide.

Get used to used to headlines like "J.C. Penney Is Closing These 138 Stores This Spring".

According to some experts, Amazon could end up killing more than 2 million jobs over the next few years - more than China ever has.

So - can Amazon be stopped?