The phrase and concept of "[[smart contracts]]" was developed by Szabo with the goal of bringing what he calls the "highly evolved" practices of contract law and practice to the design of electronic commerce protocols between strangers on the Internet. Smart contracts are a major feature of [[cryptocurrency]] and the programming language E.
Szabo influentially argued that a minimum granularity of [[micropayments]] is set by mental transaction costs.
At one time Szabo was a proponent of "[[extropian]]" life extension techniques.