The Constitution is a Libertarian concept. The Bill of Rights and the Declaration were both written by people with Libertarian principles. Maybe some extreme Libertarians do balk at the things you speak of, but as someone of a Libertarian mind, having a military is necessary. Taxes seem to be, unfortunately, a necessary evil, though they need to be much lower. And certain trade regulations that prevent crooked organizations from f**king people over are 100% necessary. Slavery is unconstitutional and goes against Libertarian principles, I don’t understand how it took so long to ban it in this country, most likely corrupt politicians are to blame.