"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
Okay, so Defense is explicitly named. And I'm not taking sides or anything here but it could be argued that "the general Welfare" could be understood to mean that the health of the Nation's citizens is of some importance to the Federal government.
As to education, I don't know about you but I would count that as one of the blessings of liberty as well as a means to provide for domestic tranquility. It's hard to claim that you have liberty if you are unaware of said liberty or of what having that liberty means. And a reasoned, rational discourse will always be a more tranquil solution to any problem. It's impossible to have a rational argument with someone who is totally ignorant, as they cannot hold two conflicting ideas in their minds. So an education is the way to go to get there.
Just my two cents. Perhaps before calling someone a dimwit and insisting on them referencing some source material it would be wise to be familiar with that same material.