the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today a mere 1.6 billion people the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today Current World Population the world population was two-thirds what it is today the world population was two-thirds what it is today the world population was two-thirds what it is today