Final answer:
Daniel Callahan is the author who argued against Voluntary Active Euthanasia (VAE), raising concerns about societal implications and the value of human life.
Step-by-step explanation:
The author who argued against Voluntary Active Euthanasia (VAE) is Daniel Callahan. Callahan is known for his skeptical views on certain forms of euthanasia and has been vocal about the potential societal implications of accepting VAE. His work often explores bioethical issues, including the question of whether physicians should participate in ending the lives of their patients on the grounds of compassion or autonomy. He believes that allowing VAE could lead to a slippery slope where the value of human life is compromised and where societal pressures could influence decisions about death and dying.