Physics
There's a law of physics that says disorder always increases in a closed system, and it might be the most quietly poetic thing thermodynamics has ever produced.
The Law That Says Things Fall Apart
The second law of thermodynamics, formalized in the mid-1800s through the work of physicists including Rudolf Clausius, who coined the term 'entropy' in 1865, states that in an isolated system, entropy, a measure of disorder or energy unavailable to do work, never decreases over time. It's part of why heat flows from hot to cold and not the reverse, why a dropped glass shatters but never spontaneously reassembles, and why engines can never be perfectly efficient. On a cosmic scale, some physicists point to entropy as part of why time itself appears to move in one direction.
Clausius derived the word 'entropy' from the Greek 'entropia,' meaning a turning toward or transformation, deliberately choosing a term that echoed 'energy' in its construction while describing something conceptually distinct.
Order Requires Ongoing Effort, Not a One-Time Fix
Because entropy in a closed system only increases, maintaining any kind of order, in a room, a body, a mind, a project, requires continuous energy input working against that natural drift toward disorder. Living organisms are sometimes described as systems that locally decrease entropy by consuming energy from their environment, a real thermodynamic distinction, not just a metaphor, that helps explain why staying organized, physically or mentally, is an active process rather than a default state.
- Entropy is measured in units of energy divided by temperature, most commonly joules per kelvin.
- The second law technically only guarantees entropy increases in a closed or isolated system, local decreases are possible if energy is added from outside.
- Some physicists connect entropy to the 'arrow of time,' the observation that time seems to move in only one direction at the macroscopic scale.
The Design
A black flame and smoke illustration framed in a radiating starburst, exhale entropy lettered beneath, for the one letting go of the chaos instead of trying to control every particle of it.
Flame and starburst illustration on a soft, garment-dyed Comfort Colors tee.
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Every Comfort Colors tee Etherlotus makes, in one place.
Shop All T-Shirts →Frequently Asked Questions
Who coined the term 'entropy'?
Physicist Rudolf Clausius introduced the term in 1865, deriving it from a Greek word meaning transformation or turning toward.
Does entropy always increase everywhere?
Only guaranteed in a closed or isolated system. Local decreases in entropy are possible when energy is added from an outside source, which is part of how living organisms maintain their organized structure.
Is entropy connected to why time moves forward?
Some physicists do link the 'arrow of time' to entropy's one-directional increase, though it remains an active and somewhat debated area within theoretical physics.
What's the wash care for this shirt?
Machine wash cold, tumble dry low, to preserve the garment-dyed finish.
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Flame and starburst illustration on garment-dyed Comfort Colors cotton.
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