This time, the revolutionary struggle caused by the contradiction of proletariat and bourgeoisie urgently needs one kind theory promulgating the law of development of society the science to instruct.

• 这一时期,无产阶级与资产阶级的矛盾所引发的革命斗争迫切需要有一种正确揭示社会发展规律的理论来指导。