Marx called capitalism a force that melts fixed social forms into air.

Evidence

The link between Father’s twin devotions – to furnaces, metallurgy and technology in general on the one hand, and to his politics on the other – became impossible to miss when I first read The Communist Manifesto, in particular the line: All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses his real conditions of life, and his relations with his kind. — Yanis Varoufakis, Technofeudalism, 61

Categorization

• DEFINE: Give the exact Manifesto phrasing ‘All that is solid melts into air’ as the canonical encapsulation of capital’s destabilizing power — the very thing technofeudalism is said to reverse.
• corroborated: 2 independent passages support this claim — Yanis Varoufakis, Technofeudalism: What Killed Capitalism, 61