Other goals included : to make the role of literature stronger in developing international understanding and world culture ; to fight for freedom of expression ; and to act as a powerful voice to help writers who are harassed , imprisoned , and sometimes killed for their views . Other goals included : to emphasise the role of literature in the development of mutual understanding and world culture ; to fight for freedom of expression ; and to act as a powerful voice on behalf of writers harassed , imprisoned and sometimes killed for their views .