I would've thought a couple books on things you don't know might be handy. To help in building new technologies? Or just be some fun reading material

@lancer, which kind of books?

I was thinking I didn’t need anything on smithing or medicine (I’ve got education in healthcare, archaeology, biology, survival, and geology—and all the other random things I know.). But I suppose if I wanted to introduce technology, like electricity or telephone or internet, I would need to learn about it. ????

I was thinking things like electricity, if you started people off with wind turbines and water wheels then maybe we would be able to start off the electrical age with a green start instead of fossil fuels. Engineering, chemical and mechanics books would be invaluable to people back then but you would need to teach them since the books would be too advanced for ancient humans.

They had water wheels as far back as 3-400 bce, and windmills 5k bcc.

Alchemy was pretty advanced by then too.

Engineering was also pretty advanced. I.e. bridges, arches, plumbing, water conveying.

But collecting the electricity and making items to use it would be needed. ????

You’re cute. ‘Ancient humans’. We as a species, have been homo sapien sapiens for 50k Year’s or so. ????

Sorry, you got the archaeologist in me started. ????

And it was technology that sent us backwards from using ‘green’ energy.

@Annaleda I just meant ancient to describe them differently from modern humans.

Also I just thought that if we could convince and teach people about renewable energy sources before the petroleum age came about, we could reduce the negative environmental impact on the planet.

Economically speaking, those items would be priceless if taken back in time. The supply would be so low and the currency comparatively not been depreciated for 2000 years. So they'd be worth the equivalent of millions