The idea
Deliberately to take action to terminate a life from the moment of conception should once again be made illegal.
Why is it important?
The right to life is a fundamental human right. The unborn are human. At the moment of conception they become, by any reasonable definition, human. They are genetically members of the species homo sapiens, and between that moment and birth, there is no clear dividing line when a change occurs. If there is no clear dividing line, then no change occurs (if it is illegal to kill at some precise moment and not before, that must be because a significant change occurs at that moment).
It follows that to kill the unborn is murder, and the clear denial of that unborn child's right to life. We will not execute murderers and rapists because of this principle, but we will inflict a particularly brutal killing on defenceless, innocent children. This is unnacceptable in any society that aspires to be civilised.