Consider not only the ethical, economical, and ecological ramifications of an existence sustained --and sourced-- from the lives of others (fauna). The practises of the exploitation of animals as livestock. For there are those 'unseen' biological entities, of which a resurgence is evident; and through the aforementioned practises are the conditions supplied in quickening their advance...
Such 'forces' (microorganisms) care not for the lives or 'well-being' of humanity, so far as such symbiosis --between the macro, and micro-- serves the purposeful intent (that is the preservation of the ideal microbial ecosystems, as necessary to survival).
Evolution --and the resulting complexity that is the human being-- provides validity to the notion that we are each an 'individual', though perhaps it would be more accurate an assumption that the 'self' is little more than a psychological construct. A construct to provide unity, and 'drive' to the functions of the microscopic lifeforms that comprise us, and exist within; that act through an elaborate state of co-efficiency. We are the external form, of the internal many.
Scientific advancements have provided much for the human species, though the negative 'returns' are more obviously documented within the greater (climate change) than they are within the microscopic; this should not be, for it is within the latter that harmful bacteria develops 'anew'.
Animal husbandry, pastoral farming, and those industries that supports the exploitation of animals as 'livestock', have made significant use of science, in meeting the necessary efficacy --as deemed required-- for the chain of 'supply, and demand'. Though the aforementioned 'chains' have loosened with time (and with the provision of knowledge) it would seem a direct appeal to the self-serving nature of the individual is necessary to enact change (through the catalyst of 'fear'). As it is the continual, over miss-use of anti-biotics within these industries, that have supplied the necessary pressures --and conditions-- in quickening microbial adaptations. Such adaptations that we are now witnessing, and those adaptive qualities (as mentioned) threaten humans when located within each harmful bacterium. The diseases resulting are re-purposed --with a focus on immunisation against the use of such medication-- with disastrous consequences for the human species.