In today’s world, there is less hunger than there was a few decades ago. The advances of the green revolution have increased food production in many parts of the world. However, there is still a great deal of hunger in the world. There are at least two major problems that contribute to this.
First, there is the fact that people in some countries are not able to grow enough to feed themselves. This is particularly true in less-developed countries where many farmers do not have the money to buy the sorts of machinery, chemicals, and seeds that would increase their output. It is also true because such countries lack the infrastructure to make it easy for crops to get to market.
Second, there is the fact that many people simply do not have enough money to buy the food that exists. In other words, there is plenty of food being produced in the world. However the food does not make it to those in need because they cannot afford it. We end up with a situation where there is too much food in some places and not enough in others.
The problem of hunger, then, is largely an economic one. We can grow enough to feed the world, but we have not yet managed to make sure that everyone gets enough of what we grow.