William Bruce Cameron
Informal Sociology: A Casual Introduction to Sociological Thinking, 1963
Cameron was grumbling about attempts to turn all of social life into statistics, and the sentence has since been used against metrics culture.
the myth (Albert Einstein): A sign with these words reportedly hung in Einstein's Princeton office, which is why he gets the credit. Researchers have traced the sentence to a sociologist's 1963 textbook.
Source: Quote Investigator