All meats--chicken, fish, pig, cow-contain no fiber or very little fiber.
All dairy--milk, yogurt, ice cream, cheese-contain no fiber or very little.
Refined grains--white rice, white bread, most boxed breakfast cereals, soft drinks (sugar)--contain no to little fiber.
What has fiber? Beans, whole grains, fruits, vegetables, nuts and seeds.
How to cure obesity in the world? Let every morsel of food you eat contain fiber. Eschew foods that have little to no fiber. Try it for two days, see for yourself. It may be the hardest two days of your life, but it could well be the most eye opening two days.