The inevitability of historical development stipulates that people's activities should be restricted by law, but people's choice in the space of possibility cannot be denied. Marx pointed out that there are various objective trends and possibilities at every stage of social development, and people need to determine their attitudes and make choices.
③ The topic selection is the choice of possible directions, goals and ways for the future development of social life under the given historical conditions. The possibility of the future development of social life is the objective premise of subject selection, and the interests and needs of the subject are the internal basis of choice.