Al Gore, the former vice-president of the United States, lives in a mansion that uses more electricity than the average family's bungalow! David Suzuki rides on a bus that uses more fuel than a Smart car to get across Canada! Oh my God! And this is just the tip of the vanishing iceberg!
Hunger also changes the world - when eating can't be a habit, then neither can seeing.
Don't confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.