If you were sent back to the roman era and could only bring a backpack of goods. What would you bring?
A book with pictures detailing all the processes required to make paper, and the schematics for a printing press. I know better than to presume my knowledge of electricity will be of any use, I know better than to think that I understand math better than ancient mathematicians, and I know better than to try to convince them that tiny little creatures are what cause illness. What I can do is jump-start humanity’s ascent to modern technology by improving literacy a few centuries early
Dont forget ink recipe. A new type of ink had to be invented for the printing press. Soot, turpentine, and walnut oil should do it.
And you give away the press for free, but the ink will cost a fortune!
A (tape) camera to document how I obliterate the roman empire by spreading pathogens that have yet to evolve but I have developed immunity for.
And something like a time capsule to burry the camera in.
Dont want to be that guy, but the platic softeners inside the tape will most likely evalporate, causing the tape to break up und cruble to dust as soon as you try to play it. The magnetic orientation of the bits will also degarde. Manufacturers give an expected shelf life of 30 years for any magnetic storage medium.