Off the top of my head * The Haber-Bosch process (for creating synthetic fertilizers) * Fracking (strictly in terms of the promise to unlock previously un-usa

Off the top of my head * The Haber-Bosch process (for creating synthetic fertilizers) * Fracking (strictly in terms of the promise to unlock previously un-usable petroleum reserves, whether or not that's a good thing depends on how climate change affects humanity in the longer run) * Solar cells * Penicillin (and antibiotics more generally) * Vaccines in general * mRNA vaccines in particular (maybe too early to tell, we'll see if the COVID vaccines were a one-hit wonder) * Semaglutide (again, maybe too early to tell)