4 ideas
When the 1918 civil war comes, these acquaintances land on opposite sides, with Cedi Lilliehjelm among the Whites and Allu with the Reds. The novel then follows how that war shapes their lives through the 1920s and 1930s.
Because the combatants shared one city, its streets, sports clubs and workplaces, the violence of 1918 was carried out by people who could recognise each other. That familiarity did not restrain the killing. The executions and prison camps turned prior social contact into material for grudges and denunciations, so the violence felt personal as well as political.
In Helsinki the Swedish-speaking elite's language worked as a marker of class as well as ethnicity. The Swedish language, the family firm and bourgeois manners reinforced one another as a single inherited position. Seen this way, conflicts over language and nationalism are partly class conflicts in disguise, and the minority's defensiveness is partly a defence of wealth.
After 1918 the victors told the war as a war of liberation, while the defeated remembered a class war and mostly kept silent. Without a shared reckoning, the city's memory stayed split. The resentments and heroic self-images of the winning side then fed the right-wing radicalism of the late 1920s and 1930s, so the war carried on in politics after the fighting ended.