Not a fifth lens — a map of where the four above genuinely disagree.
The sharpest dispute is over 1971 itself. The consensus and cultural readings treat the Liberation War as a broadly unified popular uprising against an oppressive, religiously-invoking Pakistani state, its scale of violence and moral clarity largely settled facts. The revisionist reading accepts the same war but disputes both its casualty figures and its moral symmetry, arguing that Bengali unity and Pakistani culpability have been simplified for nation-building purposes — a claim most Bangladeshi and international historians reject as understating well-documented atrocities.
A second, quieter divergence concerns identity itself: the consensus and economic lenses treat Bengali linguistic-cultural identity as the country’s true foundation, with religion as a secondary or contested layer, while the cultural/religious/political lens insists the two identities have never actually been settled relative to one another, and that Bangladesh’s recurring political instability, including events as recent as 2024–25, stems precisely from that unresolved balance.
All four lenses agree, however, on one point: that the delta’s fertility and hazard, and Bengal’s long experience of being governed from elsewhere, run underneath every other explanation offered for the country’s history.
Reference status: verified via web search — Willem van Schendel’s A History of Bangladesh; Sarmila Bose’s Dead Reckoning; Rafiuddin Ahmed’s The Bengal Muslims 1871–1906; Iftekhar Iqbal’s The Bengal Delta; and Sunil Amrith’s Unruly Waters — all confirmed as real, correctly attributed works. Bose’s revisionist casualty and moral-symmetry claims are strongly contested by mainstream scholarship, as noted above rather than presented as settled.