Robert Owen and other utopian socialists dreamed about a just social system. Great contribution to the fur­ther development of revolutionary the­ory was made later by great Russian revolutionary democrats: V. G. Belinsky (1811—1848), A. T. Hertzen (1812—1870), N. G. Chernyshevsky (1828— 1889) and N. A. Dobrolyubov (1836—1860). Here are some brief notes about them.