Montreal's Jewish community is one of the oldest and most populous in the country, formerly first but now second to Toronto and numbering about 100,000 according to the 2001 census. The community is quite diverse, and is composed of many different Jewish ethnic divisions that arrived in Canada at different periods of time and under differing circumstances. The Jewish left and secular Jewish culture have flourished in Montreal, producing notable artists and public figures such as Charles Krauthammer, Mort Zuckerman, Naomi Klein, Leonard Cohen, Irving Layton and Gerald Cohen.