In the 1950s, criticism from medicine and the multitude of disabled World War II veterans resulted in the emergence of a more reductionistic philosophy. While this approach led to developments in technical knowledge about occupational performance, clinicians became increasingly disillusioned and re-considered these beliefs. As a result, client centeredness and occupation have re-emerged as dominant themes in the profession. Over the past century, the underlying philosophy of occupational therapy has evolved from being a diversion from illness, to treatment, to enablement through meaningful occupation.