 Wolfensberger's The Principle of Normalization in Human Services (1972) and his companion work, the service quality evaluation tool Program Analysis of Service Systems, or PASS (Wolfensberger & Glenn, 1975), together extensively explicate normalization in terms of its implications to service provision.In doing so, these publications contributed decisively to an international wave of service change away from segregating people from typical society, and putting them into large institutions with grossly abnormal living conditions (bad beyond what most “normal” people were able to even imagine), and toward supporting their integration into normative community settings and activities.Normalization was taught as having two dimensions, one of interaction and one of interpretation.