 The warmth together with isostasy made it possible to inhabit the area around Kalix.Already around year 1000 Kalix had goods from the forest and river which would cause people from the south to sail all the way up to Kalix.The tradition of trading seems to have continued across the centuries because when Carl von Linné and his apprentice Lars Montin visited the Kalix marketplace in 1732 and 1749 he complained about the haggling with the Kalix' traders which allowed the people of Kalix a good price on butter and tar but drove up the inflation in Stockholm.