The signals of a degrading environment are many and on an existential scale, imperilling the world’s ecosystems. Rising surface temperature. Warming oceans. Sinking Greenland and Antarctic ice sheets. Glacial retreat. Decreased snow cover. Sea-level rise. Declining Arctic sea ice. Increased atmospheric water vapour. Permafrost thawing. Ocean acidification. And not least, supercharged weather events (more often, longer lasting, more intense).
Proxy (indirect) measurements — ice cores, tree rings, corals, ocean sediment — of carbon dioxide, a heat-trapping gas that plays an important role in creating the greenhouse effect on Earth, have spiked dramatically since the beginning of the Industrial Revolution. The measurements underscore that the recent increase far exceeds the natural ups and downs of the previous several hundred thousand years. Human activity — use of fossil fuels to generate energy and run industry, deforestation, cement production, land use changes, modes of travel, and much more — continues to be the accelerant.
The reports of the United Nations’ Intergovernmental Panel on Climate Change, contributed to by some 1,300 independent scientists and other researchers from more than 190 countries worldwide, reported that concentrations of carbon dioxide, methane, and nitrous oxides ‘have increased to levels unprecedented in at least 800,000 years’. The level of certainty of human activity being the leading cause, referred to as anthropogenic cause, has been placed at more than 95 percent.
That probability figure has legs, in terms of scientific method. Early logical positivists like A.J. Ayer had asserted that for validity, a scientific proposition must be capable of proof — that is, ‘verification’. Later, however, Karl Popper, in his The Logic of Scientific Discovery, argued that in the case of verification, no number of observations can be conclusive. As Popper said, no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are white. (Lo and behold, a black swan shows up.) Instead, Popper said, the scientific test must be whether in principle the proposition can be disproved — referred to as ‘falsification’. Perhaps, then, the appropriate test is not ability to prove that mankind has affected the Earth’s climate; rather, it’s incumbent upon challengers to disprove (falsify) such claims. Something that hasn’t happened and likely never will.
As for the ethics of human intervention into the environment, utilitarianism is the usual measure. That is to say, the consequences of human activity upon the environment govern the ethical judgments one makes of behavioural outcomes to nature. However, we must be cautious not to translate consequences solely in terms of benefits or disadvantages to humankind’s welfare; our welfare appropriately matters, of course, but not to the exclusion of all else in our environment. A bias to which we have often repeatedly succumbed.
The danger of such skewed calculations may be in sliding into what the philosopher Peter Singer coined ‘speciesism’. This is where, hierarchically, we place the worth of humans above all else in nature, as if the latter is solely at our beck and call. This anthropocentric favouring of ourselves is, I suggest, arbitrary and too narrow. The bias is also arguably misguided, especially if it disregards other species — depriving them of autonomy and inherent rights — irrespective of the sophistication of their consciousness. To this point, the 18th/19th-century utilitarian Jeremy Bentham asserted, ‘Can [animals] feel? If they can, then they deserve moral consideration’.
Assuredly, human beings are endowed with cognition that’s in many ways vastly more sophisticated than that of other species. Yet, without lapsing into speciesism, there seem to be distinct limits to the comparison, to avoid committing what’s referred to as a ‘category mistake’ — in this instance, assigning qualities to species (from orangutans and porpoises to snails and amoebas) that belong only to humans. In other words, an overwrought egalitarianism. Importantly, however, that’s not the be-all of the issue. Our planet is teeming not just with life, but with other features — from mountains to oceans to rainforest — that are arguably more than mere accouterments for simply enriching our existence. Such features have ‘intrinsic’ or inherent value — that is, they have independent value, apart from the utilitarianism of satisfying our needs and wants.
For perspective, perhaps it would be better to regard humans as nodes in what we consider a complex ‘bionet’. We are integral to nature; nature is integral to us; in their entirety, the two are indissoluble. Hence, while skirting implications of panpsychism — where everything material is thought to have at least an element of consciousness — there should be prima facie respect for all creation: from animate to inanimate. These elements have more than just the ‘instrumental’ value of satisfying the purposes of humans; all of nature is itself intrinsically the ends, not merely the means. Considerations of aesthetics, culture, and science, though important and necessary, aren’t sufficient.
As such, there is an intrinsic moral imperative not only to preserve Earth, but for it and us jointly to flourish — per Aristotle’s notion of ‘virtue’, with respect and care, including for the natural world. It’s a holistic view that concedes, on both the utilitarian and intrinsic sides of the moral equation, mutually serving roles. This position accordingly pushes back against the hubristic idea that human-centricism makes sense if the rest of nature collectively amounts only to a backstage for our purposes. That is, a backstage that provides us with a handy venue where we act out our roles, whose circumstances we try to manage (sometimes ham-fistedly) for self-satisfying purposes, where we tinker ostensibly to improve, and whose worth (virtue) we believe we’re in a position to judge rationally and bias-free.
It’s worth reflecting on a thought experiment, dubbed ‘the last man’, that the Australian philosopher Richard Routley introduced in the 1970s. He envisioned a single person surviving ‘the collapse of the world system’, choosing to go about eliminating ‘every living thing, animal and plant’, knowing that there’s no other person alive to be affected. Routley concluded that ‘one does not have to be committed to esoteric values to regard Mr. Last Man as behaving badly’. Whether Last Man was, or wasn’t, behaving unethically goes to the heart of intrinsic versus utilitarian values regarding nature —and presumptions about human supremacy in that larger calculus.
Groups like the UN Intergovernmental Panel on Climate Change have laid down markers as to tipping points beyond which extreme weather events might lead to disastrously runaway effects on the environment and humanity. Instincts related to the ‘tragedy of the commons’ — where people rapaciously consume natural resources and pollute, disregarding the good of humanity at large — have not yet been surmounted. That some other person, or other community, or other country will shoulder accountability for turning back the wave of environmental destruction and the upward-spiking curve of climate extremes has hampered the adequacy of attempted progress. Nature has thrown down the gauntlet. Will humanity pick it up in time?
