If you're in a supermarket, and the year is 1940, you're probably staring at the wall of butter... that isn't there.
If you're in the middle of an open field behind enemy lines in Germany, and the year is 1940, you're grateful for that wall of invisible butter, because it put that fully loaded semi-automatic rifle in your hand. So, you take out the three nazis in front of you and you begin to realize that you're making the world a better place. You, and your gun, are making the world a better place... and it's all because of the invisible butter, the opportunity cost for that adrenalin rush acquired by the lifeless gasp and collapse of the enemy. Therefore, the absence of butter in one's life is not only an insentive to lower cholesterol, but it also makes people feel better about themselves. Down with butter!
...but then it's up with guns.
If you're in a school classroom, and the year is 2000, you probably jump everytime the door creaks open for fear of the entry of an angry student accompanied by a fully loaded semi-automatic rifle in their hand. You thank god for the full wall of butter in the grocery store. You also pray for those fellow students that you lost on that overcast April 20th, they were the opportunity cost for the budget, the tax cuts, and whatever else congress could slip in the schedule ahead of gun control that day. You pray that the death threats they called into your school twice last week won't happen anymore, or that you'll become numb to the dead six year old girl that stuck out her tounge on the playground one day only to have it blown back into her skull on the next.
Up with butter.