1927-1999. German-American physicist at IBM.
Established Landauer's principle (1961): erasing one bit of information dissipates at least $k_B T \ln 2$ joules of energy as heat.
This links information theory to thermodynamics irreversibly: computation has a minimum physical cost. destroying information increases entropy. creating order (one bit of syntropy) requires at least $k_B \ln 2$ joules.
For the cybergraph: GPU watts set a physical floor on how fast collective meaning can grow. the Landauer bound connects hardware power to syntropy production rate.
see negentropy vs entropy for the thermodynamic framework. see dissipative structures for why energy flow is required. see entropy for the quantity being bounded