Quantitative measurement is essential to exact sciences. Political Science had lacked this method up to the end of the nineteenth century, Writing at the turn of the present century, Graham Walla’s said: “The efficacy of political science, its power of forecasting the results of political causes, is likely to increase…because modem psychology offers us a conception of human nature much truer though more complex than which is associated with die traditional English political philosophy, and under the influence and example of the natural sciences, political thinkers are already
* Sec J.C. Davies. Why do revolutions occur? In the Practice of Comparative Politics, pp. 135- 154 ed. By Lewis and Potter. Oxford University Pitas.
beginning to use quantitative rather than merely qualitative words and methods, and are able therefore to State their problems more fully and to answer them with a greater approximation to accuracy.” Half a century later, Michigan University survey analysts in the U.S.A., following Walla’s dream declared: “Deep-seated laws of social behaviour we presume to exist and with proper phrasing they should not only outlast reversals of voting patterns but should predict them.” These beliefs led to two important consequences in the twentieth century: firstly, die behavioural movement in Political Science, as we have described in a previous chapter, and adoption of the quantitative methods in Political Science.