By it's nature it is not a solitary private act. It is a state licensing of one person to actively engage in the taking of another human being's life. If the Equal Protection clause of our U.S. Constitution, along with the equal protection jurisprudence developed in this century by the Supreme Court, is to mean anything at all, it means that everyone falls under the laws against killing human beings equally and without exception, even by one's own consent. The common good of all requires that all human life be unalienable because unalienable rights pertain to human nature. In an ordered society that exists under the rule of law, individual personal rights do not exist in an independent autonomy.
Unrestrained individualism is the very definition of anarchy.
We live as Americans in a society of ordered liberty, sharing life in a common good, which requires a balancing of individual rights with those belong to us in the commonweal. If there is anything that is un-American, it is the notion that I have individual freedoms and rights that are independent of and free from those we hold in common in an ordered, and therefore limiting, society. Human life is totally unalienable if we are all to be totally free as Americans.