The rise of Islam offers perhaps the most impressive example in world history of the power of words to alter human behavior in sudden, surprising way… - William Hardy McNeill

I am old enough to remember well the depression years of the middle 1930s, when economists were quite unable to agree on what public policy should be, and when President Hoover, in need of advice, turned by preference to sociologists to study and illuminate recent social trends. The circumstances of the 1980s seem similar; perhaps contemporary confusions and dismay will mark the dethronement of economics from its privileged place among the social sciences — but perhaps not.

There is a deep irony in the fact that the more nearly an ideal is brought to realization, the more acutely do the saints and heroes who have committed themselves to the task, experience a vehement sense of failure in not having perfected their ideal in its totality; and inversely, the more perfunctory is the pursuit of an ideal, the less are people troubled by discrepancies between practice and principle.

Predictive social science does not exist. Indeed, it seems to me that it cannot ever exist, since the behaviour to be predicted reacts to and is partly shaped by the words used by the predictors.