In a 2017 post on the popular science website Edge.org, Steven Pinker provides an answer to the question, ‘What scientific term or concept ought to be more widely known?’ as follows:
The Second Law of Thermodynamics states that in an isolated system (one that is not taking in energy), entropy never decreases… Closed systems inexorably become less structured, less organized, less able to accomplish interesting and useful outcomes, until they slide into an equilibrium of gray, tepid, homogeneous monotony and stay there.
Pinker's acknowledgement of this forbidding state of affairs (one which, on a bad day, might apply to any number of long-term scientific or scholarly enterprises, not excluding musicology in Ireland), is not, however, and end but a beginning, at least insofar as it leads him to a conclusion which is as transcendent and optimistic as it is far-reaching and (proverbially) universal:
The Second Law of Thermodynamics defines the ultimate purpose of life, mind, and human striving: to deploy energy and information to fight back the tide of entropy and carve out refuges of beneficial order.
Human life as a rearguard action against the otherwise overwhelming and inevitable disintegration of the universe may not be to everyone's taste as an implicit principle of behaviour, but the resilience of this principle has a long history, even if it is not often formulated with such lapidary (not to say optimistic) grace, and especially not at the present moment, when the rage for order in human affairs is so violently contested and endangered.