He is generally seen as the pioneer of public opinion polling in the Soviet Union more than thirty years before its breakup.
Grushin graduated from the Faculty of Philosophy of the Lomonosov Moscow State University in 1952 with a dissertation on The Logical and Historical Problem in Marx's Capital.
In 1957 he completed his postgraduate study in the same place, with a thesis on Receptions and Ways of Reproducing the Thoughts of Historical Development.
Other members who entered the circle included Aleksandr Zinovyev, Merab Mamardashvili and Georgy Schedrovitsky.
Some of his pupils and followers include J. Kapeljush, V. Sazonov, T. Dridze, A. Zhavoronkov, A. Vozmitel, V.Korobejnikov, E. Andrjushchenko, V. Tokarovsky, E. Avraamova, L. Byzov and many more.