Prospect has revealed its list of the world's most influential thinkers.
The winners were chosen by the magazine's readers who voted on a selection of 50 names short-listed by staff.
Russell Brand came in at number four - above two Nobel prize winners, economist Paul Krugman and psychologist Daniel Kahneman.
The full top 10 is below:
Thomas Piketty, economist
Yanis Varoufakis, Greek finance minister
Naomi Klein, author
Russell Brand, comedian and campaigner
Paul Krugman, economist
Arundhati Roy, activist and author
Jurgen Habermas, philosopher
Daniel Kahneman, psychologist
John Gray, philosopher
Atul Gawande, surgeon