2. Frederick the Great changed the perceived value of the potato in Prussia. Only by planting potatoes in a royal garden. Then having it guarded. But when the potatoes were being guarded it made it seem more like potatoes are better than what they originally believed they were. Ataturk used perceived value to deter women from wearing the veil in Turkey by making it into a rule.
3. But by changing what people think is more effective than trying to change real life. But when something is perceived as better or seems like something is worth more. But then people are more likely to want to buy something. Somebody could save more money and make more time for if they just try to change someone's opinion on something that you or someone else is trying to sell or make people agree with you or someone on. But not completely changing the entire product.