In his work" the Collapse of the second international "(may-June 1915) Lenin stressed that the revolution cannot be" imported " from the outside, it is the result of the internal development of each country, is generated by objective reasons, extreme exacerbation of social contradictions, urgent crises, called revolutionary situations. But in order for the revolutionary situation to turn into a revolution, Lenin pointed out, it is necessary that the objective factors be joined by the subjective: the capacity of the revolutionary class for mass revolutionary action. Lenin considered the leadership of the revolutionary struggle of the working class by the Marxist party to be the decisive condition for the victory of the socialist revolution. The works "on the slogan" disarmament "and" the Question of peace " are devoted to the problems of war and peace in the future socialist society. Lenin wrote that the revolution must be able to defend itself, although "disarmament is the ide