Before the problem of death is solved, the Russian philosopher and librarian Nikolai Fedorovich Fedorov (1827–1903) believed, there will be no real solution to any social, economic, political, or philosophical question. He suggested that mankind should unite their efforts in what he called “the common task”: to convert tools of destruction into tools of salvation, bringing all those who have ever lived back to life. His ideas were deeply humanistic, and included all: the mighty and the weak, those from the present, and those from the past. «We shall not live for ourselves or for others, but with all, for all», he wrote.