Polish sociologist and historian of ideas, professor of the University of Warsaw, columnist, Member of the Sejm in the 5th term. Son of Anna Kamieńska, writer and translator, and Jan Śpiewak, poet and translator. Specialist in general sociology, sociology of politics and the history of social and political ideas and philosophy. His research is focused around and popularises Western philosophy and the theory of politics, especially conservative and liberal thoughts (John Stuart Mill, John Acton, Erving Goffman, Michael Oakeshott, Leo Strauss, Eric Voegelin). Śpiewak also investigates the issues of political and social transformations in Poland and Central Europe and has published numerous academic works in this field. Considered to be one of the authors of the slogan Fourth Polish Republic. His interest in the Bible resulted in the publication of the Midrasze, Księga nad Księgami and a series of commentaries in the Tygodnik Powszechny.