What’s the population of your world?

For I was hungry, and you fed me.  I was thirsty, and you gave me a drink.  I was a stranger, and you invited me into your home.  I was naked, and you gave me clothing.  I was sick, and you cared for me.  I was in prison, and you visited me….I tell you the truth, when you did it to one of the least of these my brothers and sisters, you were doing it to me!

Matthew 25:35-36, 40