Due process is the legal requirement that the state must respect all of the legal rights that are owed to a person. Due process balances the power of law of the land and protects individual persons from it. When a government harms a person without following the exact course of the law, this constitutes a due-process violation, which offends against the rule of law.

Due process has also been frequently interpreted as limiting laws and legal proceedings (see substantive due process), so that judges - instead of legislators - may define and guarantee fundamental fairness, justice, and liberty. This interpretation has proven controversial, and is analogous to the concepts of natural justice, and procedural justice used in various other jurisdictions. This interpretation of due process is sometimes expressed as a command that the government must not be unfair to the people or abuse them physically.

Due process is not used in contemporary English law, though two similar concepts are natural justice (which generally applies only to decisions of administrative agencies and some types of private bodies like trade unions) and the British constitutional concept of the rule of law as articulated by A. V. Dicey and others. However, neither concept lines up perfectly with the American theory of due process, which, as explained below, presently contains many implied rights not found in the ancient or modern concepts of due process in England.

The Pleasure Principle is the third studio album, and debut album under his own name, by electronic music pioneer Gary Numan, released in 1979. Released the same year as Replicas (under the name Tubeway Army), The Pleasure Principle also went to number 1 in the United Kingdom and paved the way to chart success for a string of synthpop acts such as Ultravox, The Human League, Depeche Mode and Orchestral Manoeuvres in the Dark.

Numan completely abandoned guitars on the album. This change, coupled with frequent use of synthetic percussion, produced the most purely electronic and robotic sound of his career. In addition to the Minimoog synthesizer employed on his previous album, Numan made liberal use of the Polymoog keyboard, particularly its distinctive "Vox Humana" preset. Other production tricks included copious amounts of flanging, phasing and reverb, plus the unusual move of including solo viola and violin parts in the arrangements. Numan was also influenced by Kraftwerk; the track "Cars" has the same musical "glides" as "Autobahn" and both used the same synthesizers.