Then it must be possible to live irrationally.
You need to check your premises.
As I stated in great detail it is possible for people qua irrational to survive as parasites by the production of some other rational men. I am not arguing that parasitism is not possible.
But just because men have the choice to be irrational, and to behave as animals using force to seize goods from other rational men, does not mean they have to. That is what is meant by the ‘free’ in freewill.
"That which you call your soul or spirit is your consciousness, and that which you call ‘free will’ is your mind’s freedom to think or not, the only will you have, your only freedom, the choice that controls all the choices you make and determines your life and your character”(Atlas Shrugged, 934).
You are not giving volition, freewill, i.e., choice it’s due.
Ayn Rand makes the point this way:
“Man has been called a rational being, but rationality is a matter of choice —and the alternative his nature offers him is: rational being or suicidal animal. Man has to be man—by choice; he has to hold his life as a value—by choice: he has to learn to sustain it—by choice; he has to discover the values it requires and practice his virtues— by choice” (Atlas Shrugged, 931).
You only accept one side of the implications of this fact about man’s nature. You whine that man is doomed because he has the horrific burden of having to be moral, i.e., to choose to think.
Rather, than considering every single blade of grass, synthetic carpet fiber, building, productive material; rather than dropping to your knees and praise the productive genius of all the great men who provided you with your central heating, clothes, plush chair, keyboard and computer.
You choose to look for sewers, and people who have made their own souls sewers, and claim that it is stupid irrational brutes that need to be taken seriously, and who provide proof that existence is a hopeless sham.
Rather, than choosing to exist on a sub-human level, some men can choose to be men; they can choose to act according to their nature, and use their minds according to their mind’s nature.
And if the world is as you complain it is (and it’s NOT), then how much more wonderful, and how much more thanks you should give to those few wonderful men who have made your beleaguered existence possible.
Howard Roark in “The Fountainhead” makes the point:
“Throughout the centuries there were men who took first steps down new roads armed with nothing but their own vision. Their goals differed, but they all had this in common: that the step was first, the road new, the vision unborrowed, and the response they received—hatred. The great creators—the thinkers, the artists, the scientists, the inventors—stood alone against the men of their time. Every great new thought was opposed. Every great new invention was denounced. The first motor was considered foolish. The airplane was considered impossible. The power loom was considered vicious. Anesthesia was considered sinful. But the men of unborrowed vision went ahead. They fought, they suffered and they paid. But they won.” (The Fountainhead, 678)
Look around you. REALLY LOOK, and you THINK! Everything you are surrounded by is a testament to the great, rational men who have blessed our existence with the residual artifacts of their choice to be men.
"To the extent to which a man is rational, life is the premise directing his actions. To the extent to which he is irrational, the premise directing his actions is death.
"You who prattle that morality is social and that man would need no morality on a desert island—it is on a desert island that he would need it most. Let him try to claim, when there are no victims to pay for it, that a rock is a house, that sand is clothing, that food will drop into his mouth without cause or effort, that he will collect a harvest tomorrow by devouring his stock seed today—and reality will wipe him out, as he deserves; reality will show him that life is a value to be bought and that thinking is the only coin noble enough to buy it.
"If I were to speak your kind of language, I would say that man’s only moral commandment is: Thou shalt think . But a ‘moral commandment’ is a contradiction in terms. The moral is the chosen, not the forced; the understood, not the obeyed. The moral is the rational, and reason accepts no commandments. (Atlas Shrugged, 936)
In my perfect world…if I were god…
But to the extent a given person is irrational, does not plan for his future, or does not follow productive plans of actions, he produces nothing.
You act as if you acknowledge this fact. Further, you act as if this is some kind of evidence that supports your position of metaphysical futility and hopelessness.
You seem to hold the premise that: “In my perfect world men would have no choice about being rational.”
“ Thou shalt think. But a ‘moral commandment’ is a contradiction in terms. The moral is the chosen, not the forced; the understood, not the obeyed. The moral is the rational, and reason accepts no commandments. (AS, 936)
This is called “rewriting reality.” You subjectively state as if you want to be god, that if I were to have made the universe, I would have made it impossible for men to be irrational. I would have given them no choice about choosing to think. You seem to want to press your subjective whim on to reality; and now you are frustrated and malevolent because you can’t delude yourself in to accepting your own fantasy.
Take the simplest good you can think of, such as something that supposedly occurs abundantly in nature, such as a bunch of grapes or bananas. It likely took thousands of years for men to figure out what few plants he could safely eat. Note: “figure out” is a euphemism for rational thought. He would have had to observe, identify and integrate what, where, when, how to collect every scrap of food he would need for his prehistoric survival.
But, we stroll down to the nearest of dozens of available SUPER markets and pay a few cents for a bunch of grapes and never give a thought to all the THOUGHT that makes the purchase possible; the thousands of years of thought that brought our modern society into existence, and all the advancements (thought) needed to keep it and/or to make it flourish.
Some tribes of savages still attempt to survive using only a modicum of reason, there’s thousands of hours of TV programming and research dedicated to the various savages around the world. To the extent they are rational & figure out how to get their food they survive. When they reach the limits of the knowledge they or their ancestor’s reason provided them they die like animals.
It is not possible to live as a man qua man irrationally.
A man can only survive irrationally living off of victims; victims who in some capacity, degree and time have to be rational to produce the goods and services man in general needs to live. The goods and services man needs for his life are not "just here,” to be used. Goods must be produced. (period).
Ayn Rand makes the point in Galt’s Speech:
“…morality is a matter of choice. Men are free not to choose man’s survival as the standard of their morals and their laws, but not free to escape from the fact that the alternative is a cannibal society, which exists for a while by devouring its best and collapses like a cancerous body, when the healthy have been eaten by the diseased, when the rational have been consumed by the irrational.” (Atlas Shrugged, “This is John Galt Speaking”, 976)
Man has a volitional consciousness, i.e., he has freewill, and he can choose to think or not; therefore, he can choose to be a man or not. If he chooses to think and produce what he needs for his life and well-being, he’s choosing to behave as a man, i.e., in a way that is consonant with the nature of his mind, his basic tool for survival.
How can I argue an individual must live rationally when the entire history of mankind demonstrates this is not necessary?
You could not be more wrong. The entire history of man demonstrates that being rational is necessary.
Advice
There is no argument that is going to “force” someone to think. But for some reason you seem to be obsessed with trying to make other people think. You should really worry about your mind, and your own epistemology. Until you understand precisely what rationality is and what it actually, in concrete detail , makes possible around you you’ll never be able to form a persuasive argument as to the benefits of reason, and/or why men should spend more time fostering it in their lives.
Stop saying you do not disagree with whatever, and actual do the thinking required to agree or not. Look at the various goods and services and ask how did they get here?
Ask, whose more important, and what should I take more seriously: modern savages, bewailing the hopelessness of their existence; or the evidence all around of the power and potency of reason.