Full Idea
The whole notion of being at home, or being cut off from one's natural roots, the whole idea of roots, the whole idea of belonging to a group, a sect, a movement, was largely invented by Herder.
Gist of Idea
Herder invented the idea of being rooted in (or cut off from) a home or a group
Source
report of Johann Gottfried Herder (works [1784], Ch.3) by Isaiah Berlin - The Roots of Romanticism
Book Reference
Berlin,Isaiah: 'The Roots of Romanticism' [Pimlico 2000], p.60
A Reaction
Hm. Broad generalisations are an awful temptation in the history of ideas. As a corrective to this, trying reading the two Anglo-Saxon poems 'The Wanderer' and 'The Seafarer'. Very Germanic, I suppose. Interesting, though. Leads to Hegel's politics.