Agency (sociology) experiences, and the perceptions held by the society and the individual, of the structures and circumstances of the environment one is in and the position they are born into. Disagreement on the extent of one's agency often causes conflict between parties, e.g. parents and children. The concept of agency has existed since the Enlightenment. René Descartes' phrase Cogito ergo sum stated that anyone who could think is an agent , and any agent capable of knowing that it can think was a subject. Immanuel Kant expanded on this theory by stating that the only way to truly become self-aware is
Ergo Proxy two DVD box collection on September 25, 2012 and August 22, 2012 respectively. In Australia and New Zealand, the "Ergo Proxy" DVDs were distributed by Madman Entertainment, the first volume released in March 2007. The first volume of "Ergo Proxy" was released in the UK by MVM Films on August 6, 2007. The English dub of "Ergo Proxy" aired on ABC2 (the national digital public television channel) from July 3, 2007 to December 4, 2007. In Canada, the English dub aired as part of Anime Current, an Anime Television block, on pay-TV digital channel G4 Canada from July 26, 2007