Co-founder of the School with Class Foundation and member of the Foundation Council. Journalist and social activist. Graduate of the Faculty of Psychology at the University of Warsaw. In the 1980s associated with the democratic opposition. In the 1980s, editor of the underground "Mazowsze Weekly" and secretary to Bronislaw Geremek at the Round Table. Co-founder of "Gazeta Wyborcza", from 1995 to 2010 deputy editor-in-chief. Initiator of well-known social actions, including Birth with Humility, School with Class, Poland Runs. Since 2016, editor-in-chief of the Oko.press portal.