" if all money comes into existence through loans, with the returning of those loans removing the money from the money supply, where does the money to pay the interest come from? To better understand the question, consider a small island with 100 inhabitants. They have a bank that creates and loans money. Let’s assume each person gets a $100 loan. This means $10,000 has been created as the island’s total money supply. Everyone then buys goods and services, exchanging this money with each other, generating economic activity. This $10,000 in loans could then technically be returned to the bank, fulfilling the society’s loan obligations, removing all money from existence. However, if interest is charged, more money needs to be returned than actually exists. If each of those $100 loans required has a 10 percent interest fee, then while the total money supply is still $10,000, the actual value owed back to the bank is actually $11,000. So where does that extra $1,000 come from? "

― Peter Joseph , The New Human Rights Movement: Reinventing the Economy to End Oppression