https://www.marxists.org/archive/lenin/works/1902/sep/00.htm "A Letter to a Comrade on Our Organisational Tasks"
Pavlichenko_Fan_Club
joined 5 years ago
Ugh. Why? On the basis of what theory? Where has this new type been successful anywhere in the world anytime in history?
On the basis of Marxism-Leninism. Is this your first time coming across this concept?
A few old Bolsheviks wrote biographies that will give you clear, concrete details of underground activity. See "Twenty Years in Underground Russia: Memoirs of a Rank-and-File Bolshevik" by Cecilia Bobrovskaya
https://www.marxists.org/archive/bobrovskaya/twenty-years/index.htm