Entropy

Moving atoms into shape, A human nature to order,
Everything has a place,
Build it up, then take power, In temporary places,
A short fragment of time,
If it's broken fix it, But it will break again,
No action has a consequence,
On your death bed, Then you'll know,
Irreversible processes,
Functions of state,
Numbers of realisations,
Thermal energy levels,
All systems isolate,
No-repair or reverse,
Entropy increase, It is not a human issue,
No preventable course, Entropy,
The Universe Grim Reaper.

It's Entropy.