 In Geneva he met Vladimir Lenin and, although he was not yet a Bolshevik, he remained a Menshevik-Internationalist during the First World War, actively spoke out against the "defencists", and was an active participant in the "1st Geneva Group of Assistance".In the spring of 1914 he married Adelaide Abramovna Belenkina, who studied medicine in Geneva.On April 24, 1915 their son Pavel was born.