Human to god, who doesn't want that?

I think the ancient Indians was my favorite ancient civilization, because of how diverse the cultures were. The practices of both Hinduism and Buddhism is very intriguing. How to be one with the gods and how you must be good in this life to have a better standing in the afterlife. If I was to live with them then I would be a different person, there was wars and other things like not having whole foods. It would be much different but more natural. If I went back in time to give them something of the future, I would give them antibiotics, because that will help with disease such as black death. What thing from the present would you take back to the past?