Modern physics replaced indestructible matter with persistent energy.

Evidence

Energy had to replace matter as what is permanent. But energy, unlike matter, is not a refinement of the common-sense notion of a ‘thing’; it is merely a characteristic of physical processes. — Bertrand Russell, History of Western Philosophy, 271

Categorization

• corroborated: 2 independent passages support this claim — Bertrand Russell, History of Western Philosophy, 271
• XREF: connects to: The discovery of radioactivity proved that atoms could disintegrate. — Bertrand Russell, History of Western Philosophy, 270

Broader Connections

• The discovery of radioactivity proved that atoms could disintegrate. #expands (0.70) — Bertrand Russell, History of Western Philosophy, 270