Raise the age for Military service to 21

It has been illegal in the United States for anyone under the age of 21 to purchase alcohol for decades, but as of the end of 2019 it is now also illegal for anyone under the age of 21 to purchase tobacco. From CNN:

A new law in the United States that prohibits the sale of tobacco products to anyone under the age of 21 is now in effect, according to the US Food and Drug Administration.

Last week, President Donald Trump signed the new minimum age into law as part of a sweeping spending bill. On Friday, the FDA noted on its website that "it is now illegal for a retailer to sell any tobacco product -- including cigarettes, cigars and e-cigarettes -- to anyone under 21. FDA will provide additional details on this issue as they become available."

It is unconstitutional for the U.S. government to regulate the age at which any person may consume anything, be it alcohol or tobacco, or even to regulate what people consume at all, such as marijuana or any other illicit drug. The Constitution leaves that to the people or to the individual States at most, via the Ninth and Tenth Amendments, but a larger and more important point needs to be made: 18 year old Americans are still eligible to sign up for the U.S. Armed Forces, and 18 year old males are still required by law to sign up for the Selective Service, which is also unconstitutional in and of itself.

If 18 year old Americans cannot be relied on to properly judge whether they should consume alcohol or tobacco, then there is no basis upon which they could reasonably be relied upon to properly judge whether they should join the Armed Forces. The argument that they can't be allowed to decide to use substances which could be hazardous to their health, but can decide whether or not they can go fight in wars to kill or be killed makes no logical sense. They're either responsible adults in the eye of the law or they're not.

The federal government, however, wants to exert control over people's lives but still needs to get its recruits as young as possible. For starters, the Military needs its recruits to be as spry as possible for as long as possible, so the younger they get them the longer they can use them for cannon fodder in the endless wars being waged by Washington.

Secondly, the older the pool of recruits becomes the less likely they are to choose to join the Military in the first place. Firstly, they'll be more established in their lives with higher education, employment, and their families, and secondly, their brains will be more developed and they'll take more consideration of their choices. The prefrontal cortex has a lot to do with logical reasoning and decision making, and it doesn't seem to fully develop in humans until around the age of 25. At 18 it would be much less developed than at 21, so it's possible that 18 year-olds don't have the cognitive ability, with their underdeveloped prefrontal cortices, to be able to responsibly make a choice as extreme as joining the Military in the first place. If the age for Military recruits was raised to 21, or better still 25, the potential recruits would be better equipped to make such a monumental decision, and it's likely that the Military would have far less people volunteering to join as they have more to lose and more cognitive ability to weigh the risks.

If the U.S. government were actually interested in the health and well-being of its citizens then it would apply its logic regarding tobacco and alcohol across the board, including to Military recruitment. Recruiters would be banned from all high schools across the country, and would not be allowed to reach out to anyone under the age of 21 at least, and the Selective Service Act, which, again, should be struck down as unconstitutional, would have to be amended to apply to men aged 21 instead of aged 18. But the U.S. government is not interested in anyone's health or well-being. The U.S. government is interested in its own power, and its power is increased by its ability to con young Americans with underdeveloped cognitive faculties into fighting its endless, unnecessary wars.