Lots of food and water purification stuff. Crates and crates of ammo and gun cleaning supplies. Lots of guns, knives, sharpening stones, fire making material (flint/steel, sturdy magnifying glasses, etc). Survival kit with lots and lots of anti-biotics, pain killers, stitching thread, etc.) A collection of how-to books, sturdy ones, on topics like first aid, farming, metallurgy, carpentry, boat making, well construction, windmill making etc, etc., ... in case we literally do have to reinvent the wheel. Same goes for all mathematics, as much science as possible too. Books of poetry and great literature, including all the great philosophers. Many, many decks of cards (with books of games and rules), several chess sets (and books of rules... in case our progeny one day forget and need to relearn).
NO religious books. That's one human mistake we can correct on the restart. Or at the very least, make a new one that will hopefully be safer for humanity.
To quote from Emerson's "Nature":
Our age is retrospective. It builds the sepulchres of the fathers. It writes biographies, histories, and criticism. The foregoing generations beheld God and nature face to face; we, through their eyes. Why should not we also enjoy an original relation to the universe? Why should not we have a poetry and philosophy of insight and not of tradition, and a religion by revelation to us, and not the history of theirs? Embosomed for a season in nature, whose floods of life stream around and through us, and invite us by the powers they supply, to action proportioned to nature, why should we grope among the dry bones of the past, or put the living generation into masquerade out of its faded wardrobe? The sun shines to-day also. There is more wool and flax in the fields. There are new lands, new men, new thoughts. Let us demand our own works and laws and worship.
