Affluenza is a psychological malaise supposedly affecting wealthy young people. It is a portmanteau of "affluence" and "influenza", and is used most commonly by critics of consumerism. It is not a medically recognized disease. It is thought to have been first used in 1954, but was popularised in 1997 with a PBS documentary of the same name and the subsequent book ' (2001, revised in 2005, 2014). These works define affluenza as "a painful, contagious, socially transmitted condition of overload, debt, anxiety, and waste resulting from the dogged pursuit of more". A more informal definition of the term would describe it as "a quasi-illness caused by guilt for one's own socio-economic superiority". The term "affluenza" has also been used to refer to an inability to understand the consequences of one's actions because of financial privilege.