Cika wannan jumla: A watan Janairun 1905,
Kisan kiyashi na ranar Lahadi na masu zanga-zanga a St. Petersburg ya haifar da rikice-rikicen jama'a a cikin Daular Rasha da aka sani da Juyin Juya Halin 1905. Lenin ya bukaci Bolsheviks da su taka rawar gani a cikin abubuwan da suka faru, suna ƙarfafa tashin hankali. A yin haka, ya karɓi taken SR game da "tashin hankali", "ta'addanci", da kuma "karɓar ƙasa", wanda ya haifar da zargin Menshevik cewa ya kauce daga addinin Marxism na gargajiya. A biyun, ya nace cewa Bolsheviks sun rabu da Mensheviks gaba ɗaya; da yawa Bolsheviks sun ƙi, kuma ƙungiyoyin biyu sun halarci Babban Taron RSDLP na Uku, wanda aka gudanar a London a watan Afrilu 1905. Lenin ya gabatar da ra'ayoyinsa da yawa a cikin ɗan littafin "Two Tactics of Social Democracy in the Democratic Revolution", wanda aka buga a watan Agusta 1905. A nan, ya yi hasashen cewa bourgeoisie na 'yanci na Rasha zai gamsu da sauyawa zuwa tsarin mulki na tsarin mulki kuma ta haka ne ya ci amanar juyin juya halin; a maimakon haka ya yi jayayya cewa ma'aikata za su gina kawance da manoma don kifar da tsarin Tsarist da kafa " mulkin mallaka na ɗan gajeren lokaci na proletariat da manoma. "