The list of technologies that have not become a front for consolidation of resources and power appears below:
For instance, we still use steel - and for 99% of humanity's existence nobody knew how to make it. It turns out it's really easy, and it's just one amongst countless other techs along a similar lines. A human who spent a year dedicating himself to consuming freely accessible information, who was then warped back into the past, could send humanity forward by tens of thousands of years - all by himself.
We're all free to use these technologies in any way we see fit, but somehow we've created this weird society where we have all the potential in the world, but instead we spend inordinate amounts of time doing pointless things like shit posting on the internet and mostly being upset about what we can't do and/or have, even though even if we had access to such in all probability we'd again take it for granted and find something else to complain about.
This isn't really a condemnation of humanity. Probably this sort of eternal discontent we have is precisely what drove us to discover all of these great things. Like I mean who in their right mind would have left the basic oasis of Africa to go freeze their ass off and struggle just to live in the inhospitable areas up north? There's something wrong with that guy, and that guy is all of us, for the most part.