The most important source of data for research into Canadian society is the federal census. These decennial inventories, of which there have been nine since Confederation, contain hosts of numbers, most of them unfortunately rather widely ignored by social scientists. Of the battery of questions to which every individual is subjected, a few are singled out as yielding fundamental facts, and appear again and again in the tabulated product in cross-classification with other subjects. The three basic attributes, which are the sine qua non of a personal census, are age, sex, and geographical location. Next to these in importance, if we may judge by the volume and detail of published tabulations and analysis, is origin. Now the intriguing circumstance about this highly emphasized piece of information is that it remained undefined until 1951. There was no explicit indication of the operations required to identify the referent of the term. Furthermore, the answers obtained and published clearly applied to an array of different types of evidence, which could easily overlap for a given individual.
Consider, for example, the 1941 census, and its question, there termed “racial origin.” The “Instructions to Commissioners and Enumerators,” which are required reading for anyone making serious use of census statistics, give the following clues:
What is racial origin? The word “race” signifies—“Descendants of a common ancestor.” [It may be asserted that this does not specify a practicable operation.] … a person's racial origin and nationality very often are different …. The name of a country from which a person came to Canada gives no indication of that person's racial origin …. The word “Canadian” does not denote a racial origin, but a nationality; the same applies to the word “American” …. What determines racial origin? As a general rule a person's racial origin is to be traced through his father ….