Charge/Parity/Time Symmetry Is Universal

CPT symmetry in inviolable in nature. There are various explanations for that including one recently posted to Medium. However there is a new and quite interesting alternative explanation that appeared at arxiv.org.

CPT symmetry, and many other things, may be due to the Arrow of Causality.

This paper offers a rational for the idea that causality rules all of nature, including the microcosm, and the arrow of causality is the basis of the arrow of time.

Quantum causality determines the arrow of time

A very interesting paper!