About 10 million borrowers in the government's main student loan program are struggling to make their payments, yet unlike other types of debt, it's next to impossible to have it forgiven.
Economic sense has been largely irrelevant in the unfolding Greek drama. Instead, morality has been at its heart.
The increasing importance of non-traditional donors such as China has meant that the economic and political stronghold of Western countries in sub-Sahara Africa has gradually ebbed.
The global economy is already unsustainable – let alone if it gets bigger.