The mayor of New York is consideringÂ a ban on selling sweetened drinks larger than 16 ounces. The ban would not cover diet sodas, fruit juice, dairy products (like milkshakes) or alcohol. It also does not cover grocery or convenience stores. As might be suspected, the intent of this ban is to help combat obesity. About half of the adult population of the city is overweight and the mayor presumably hopes that this ban will help with this problem.

There are, of course, two key factual issues here. The first is whether or not the large drinks in question are a causal factor in obesity. The second is whether or not the ban would have the intended effect.

Not surprisingly, the folks in the relevant industries are claiming that the drinks are not the cause of the problem. On the one hand, it can be claimed that they are in error. After all, it does make sense that consuming large quantities of high calorie beverages (aÂ 12 ounce soda has 124-189 calories) would contribute to people being overweight. On the other hand, it can be argued that this is not the case. After all, the drinks are not the only (or even main) source of calories and hence they are just one contributory cause among many. There is also the point that people are not compelled to consume the large beverages and people are, by in large, obese because of their choices. My considered view is that these drinks make it easier to be obese, but that it would be an error to cast them as the primary villains, so to speak.

In regards to the effectiveness of such a ban, it seems likely that the impact will be fairly minor. While people will not be able to get drinks over 16 ounces, they are not prevented from getting refills or buying as many as they want. While the 16 ounce limit will make it slightly less convenient to get a greater volume of sweet drinks, I suspect that this inconvenience factor will not be enough to impact the obesity problem. After all, people already buy multiple burgers or tacos and can probably adjust easily to getting multiple drinks. There is also the fact that the ban does not affect drinks whose calorie content can exceed that of the banned drinks and people can switch to those. For example, Â unsweetened apple juice has 169-175 calories per 12 ounce serving.

While the factual matters are of concern, what is of philosophical interest is whether or not the state has a right to impose such bans. As might be imagined, it is easy enough to argue for and against this right using the very same principles.

One reasonable principle is that the state has a legitimate role in preventing harm to the citizens and has a right to use its compulsive power in this capacity. The most obvious examples of this include the state’s role as a military protector and its role as the police. Another reasonable principle, taken from John Stuart Mill, is that the state does not have a right to impose on the liberty of individuals except in cases in which the individual’s actions could cause unwarranted harm to others. For example, the state clearly has a right to prevent citizens from murdering each other.

In the case of the sweet drink ban, it could be argued that the state is acting to prevent harm to the citizens and is thus operating within its legitimate rights. After all, the easy accessibility of high calorie foods in high volume servings makes it far easier for people to over-consume calories and this leads to increased obesity. Obesity presents a clear health threat to individuals as well as imposing significant costs on society (such as lost productivity and increase medical costs). As such, the state would be acting rightly in banning such sweet drinks.

One easy reply is to contend that the ban would not be effective (as argued above) and hence would be an imposition on liberty that fails to achieve its stated goal. It seems reasonable enough to accept that the state should not restrict liberty when doing so would not achieve the stated goal of the imposition-after all, the justification for the imposition would simply not be grounded.

Another reply, and the one I favor, is that even if the ban was to prove effective, it is still an illegitimate violation of liberty. The state does, of course, have a right to protect people from toxic ingredients, especially when such ingredients are not known to the consumer. To use a specific example to illustrate this, the state would be acting legitimately by banning companies from surreptitiously using lead Â acetate in place of sugar as sweetener. This is because this substance is known to be toxic and most customers would not willingly consume “sweet lead.” In this case, the state would be protecting the customers from being harmed by the manufacturers. After all, companies do not have the liberty to poison ignorant customers.

In the case of the sweet drinks, the customer knows what s/he is getting: a high calorie (typically low nutrient) drink. While it is unwise and unhealthy to consume large amounts of such drinks, as long as the consumer is freely making the choice to drink the beverage and is aware of its contents and effects, then the state has no right to impose on the individual’s liberty. As usual, John Stuart Mill’s arguments in favor of liberty work quite well here. Naturally enough, the state would be well within its rights to require companies to make information about the beverages available to consumers so that they can make informed choices. However, treating adults as if they were children in this regard is not acceptable nor within the legitimate rights of the state. After all, what is solely the business of the individual is not the business of the state and how much sweet drink a person consumes would seem to be solely his or her business. The choice is thus the right of the individual, be it a good choice (to avoid sweet drinks) or a bad choice (to consume mass quantities of sugar water).

The obvious reply to this is that the harms done by obesity are not limited to the individual. Obesity increases health care costs for everyone, impacts productivity, and has other consequences that extend beyond the individual. Given that the obesity of an individual harms others, then it would seem that the state would have the right to step in and impose restrictions to counter obesity. After all, while people have every liberty to be as fat as they can and want to be, they do not have the right to expect the rest of society to also bear the consequences and costs of their poor choices. Â To modify a stock line from the right in the US, why should the rest of us subsidize the cost of obesity-surely that would be a socialism of fat.Â If this reasoning is plausible, then there seem to be two reasonable alternatives (and, of course, there might be others).

The first is that the state should act within its legitimate rights to endeavor to counter causal factors that significantly contribute to obesity (such as high volume high calorie beverages). The second is that individuals who wish to enjoy the liberty to be as fat as they choose to be would need to take full responsibility for the consequences of their choices. They would, for example, need to opt out of state medical support in regards to any conditions caused by or aggravated by their obesity, perhaps by purchasing special insurance. Provided that an individual was willing to eliminate the harms his/her choices would impose on others, then s/he would have the perfect right to do as s/he pleases. This is analogous to how certain states allow people to ride motorcycles without helmets provided that they have adequate insurance. Perhaps people could received special ID cards proving they have obesity insurance and Â this would allow them to purchase large beverages (and other such things).

A second reply to the liberty argument is that it could be argued that the sweeteners used to create the sweet drinks is actuallyÂ a toxic substance. Interestingly enough, lead acetate was once used as a sweetener until is was clearly established that it is, in fact, toxic. As such, it is not wildly implausible that the sweeteners currently in use are actually toxic substances that should be properly regulated. While it is easy enough to dismiss the idea that, for example, sugar could be toxic because it just sounds silly, it is rather important to make such assessments on the basis of scientific evidence. If sweeteners are not harmful, then an objective scientific investigation would surely show this. As such, those who think that it is silly to consider sugar and other sweeteners as toxic should insist on objective and extensive evaluation. After all, doing so would silence the rational critics of sweeteners and provide hard evidence to counter attempts to ban or restrict sweeteners and products that use them, such as sweet drinks.

My own view on the matter is that people have a right to the liberty of self-abuse (even self-destruction). However, this liberty does not allow them to impose on others. As such, the freedom to be fat comes with theÂ responsibilityÂ to ensure that other people are not forced to bear the price that the individual alone should pay. As the hackneyed saying goes, freedom is not free-and this goes for fat freedom as well.

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