The party that ruled Sweden for most of the past century has lost the ability to appeal to the middle classes and the inhabitants of the big cities, the former culture minister said in an interview on SVT on Monday.
"The internal fights and the closed atmosphere were strong contributory factors to the Social Democrats losing the election," he said.
Pagrotsky called on his party colleagues to renew the Social Democrats' programme.
"In order to be in a position in 2010 to succeed with our politics, we need to listen more and be less authoritarian."
He also accused the party of greeting new ideas with "aggression instead of encouragement. New groups have not felt welcome," he said.