Not a fifth lens, but the point the whole engine exists to make: historians describe the same island differently because they weigh its causes differently.
The meaning of 1979 independence is the sharpest dispute. The consensus and cultural readings treat it as the arrival point of a long, genuine process of nation-building — the culmination of labor movements, Kwéyòl-language pride, and constitutional self-government finally catching up with an already-formed Saint Lucian identity. The revisionist reading treats the same date as largely symbolic: a change of flag that left the island’s deeper economic dependency on outside markets and outside capital essentially untouched. Same event, opposite verdicts on how much it actually changed.
The island’s cultural duality — French-derived language and religion inside a British-built state — is read two ways as well. The cultural/political lens treats Kwéyòl and Catholicism as the substance of a distinct national identity that survived colonial rule and eventually defined it; the economic/geographic lens treats the same duality mainly as a byproduct of which European power happened to hold which piece of land when, secondary to the deeper story of crops, landholding, and trade preference.
On one point all four perspectives agree: Saint Lucia’s fourteen changes of colonial hand before 1814 were not a footnote but a formative fact, leaving the island with a hybrid inheritance no single-owner colony developed. They part only on what that inheritance means today — a genuine achieved nationhood, an unfinished negotiation with outside power, a distinct culture worth defending in its own right, or simply the accident of geography and market forces.
Reference status: every work cited is verified and correctly attributed — Harmsen, Ellis & Devaux, A History of St Lucia (2012); Tennyson S. D. Joseph, Decolonization in St. Lucia (2011); Aonghas St-Hilaire, Kwéyòl in Postcolonial Saint Lucia (2011); Mark Moberg, Slipping Away: Banana Politics and Fair Trade in the Eastern Caribbean (2008). The “flag independence” / limited-sovereignty thesis presented in the Revisionist Scholarship section is itself a contested framework within Caribbean political economy, presented as a challenge to, not a replacement for, the mainstream account.