2 ms·

Yeah, most of the answers are either related to the butterfly effect or are just silly like "sliced bread" or "the printing press." I was hoping for more seriou

• schoen 7y ago
  I've seen a couple of more substantive ones although unfortunately I didn't save links to them. I remember a couple of cautionary themes were that (1) you might easily offend or alienate people, or make them suspicious of you, (2) you might find it hard to persuade people that things you knew about had much merit or utility, (3) you might not be able to take much advantage of your modern technical knowledge without infrastructure and supply chains, and (4) you might not be able to support yourself easily in an unfamiliar economy while attempting to teach others or manufacture things with your modern knowledge. Although you might feel that there are lots of cool scientific principles that you could demonstrate to convince people that your knowledge was important, it's also likely that you wouldn't know all the necessary details or have easy access to the necessary apparatus or raw materials. Anyway, those were someone else's ideas from one of those threads—and they were expressed better there and with more specifics.