He passed studentexamen at Katedralskolan in Linköping in 1948 and received a Master of Philosophy degree from Uppsala University in 1954.

[6] Svenska Ord in general, and Danielsson in particular, excelled in making scorching comments on current events in an illusorily naive and outward-lookingly friendly way that often succeeded to endear even political opponents to his particular brand of humorist humanism.

He was also a constant campaigner behind the scene for causes ranging from anti-apartheid to anti-nuclear to social solidarity, he was also a regular contributor to the anarcho-syndicalist newspaper Arbetaren.

Danielsson, who had owned the house in Corsica for the past 20-25 years, left for Sweden a week before the bombing.

The attack, which completely destroyed the house, was carried out by the National Liberation Front of Corsica (FLNC) as part of the Corsican conflict.