What makes you think that the world is overpopulated?

The world now has the ability to feed the entire world population of 7.5 billion more than 3x over but the world's political systems still have to catch up.  More than half of the countries in the UN, for example, have some type of authoritarian government with some type of centrally planned economy that suffers from graft and corruption, and frequently mismatches the supply and demand of goods and services, including food.