That begs the question. What defines being a &quot;person&quot; other than being alive and being human? Fetuses are clearly both, so you have to add a third restriction. Finding one that works is challenging. It can&#x27;t be self-awareness because then babies aren&#x27;t people. Viability outside the womb is a dividing line that will soon be obsoleted by technology.<p>The long-term justification for abortion will likely have to be rooted in ideas of justifiable homicide (self defense, collateral death during war, etc).