system
Given the following post, respond as if you're commenting on Reddit:
human
[General Science Fiction] I am a medical doctor with a time traveling, mobile medical facility but I can only travel to one point in time. Where do I go/who do I help to make the biggest impact on humanity?
gpt
In front of a roman emperor you know had a long and peaceful reign. Preferably someone open to philosophy and science like Marcus Aurelius. Convince him of your superior medicinal knowledge and you might advance human history by centuries and save billions with the aftereffects.