Today, it is widely recognized that in order to meet environmentalchallenges, it will not simply be enough to make our lifestylesgreener ; also critical is putting an end to the modernconception of the human as master and possessor of nature.However, to bear fruit, this change in anthropology must also beaccompanied by a revision in our conception of technology.Since the Enlightenment and the development ofindustrialization, technology no longer seems to be subject to theguiding principles set by the Greeks: prudence and the search forthe right measure in all, which leads to the care of beings and theworld. Care in Technology analyzes the historical changes thathave led technology to become an unthinkable part of care, andcare an unthinkable part of technology. It also establishes theconditions for care to once again become a regulatory principle ofthe activity of engineers who design technology.