"Ideas do not die. Not that they survive simply as archaisms. At a given moment they may reach a scientific stage, and then lose that status or emigrate to other sciences. Their application and status, even their form and content, may change; yet they retain something essential throughout the process, across the displacement, in the distribution of a new domain. Ideas are always reusable, because they have been usable before, but in the most varied of actual modes."

Deleuze & Guattari, A Thousand Plateaus (p.235)