Introduction

The USA currently has $31.5 trillion in public debt, just held by the federal government alone. Averaged out, that global debt figure is now almost three times global GDP. Most sensible economists are worried about global debt levels, but as long as a few things don't go wrong, then it should be sustainable. Taking on more debt can be a really good thing if it's used to invest into projects that will produce more value for the global economy over time.