Open Questions

Open Neolithic Revolution

Why It Is Open Farming arose independently in at least seven world regions within a few thousand years of the last glacial period's end, which demands a general explanation, yet no proposed driver has won the field: end-of-ice-age climate change, population pressure, resource abundance making settlement possible, social competition and feasting, and cultural or religious change all have serious advocates, and early farmers were by skeletal evidence often worse nourished than the foragers they replaced, so the move was not an obvious improvement to those who made it.

What Would Settle It A mechanism that correctly predicts where and when domestication did and did not begin across the independent centers, tested against the archaeological, climatic and genetic records together rather than fitted to one region.

Expertise Needed Archaeology, Agronomy, Paleoclimatology

Question posed in Neolithic Revolution (Wikipedia), Causes and consequences section; theories about the origin of agriculture.

Open Western Honey Bee

Why It Is Open No single cause has been established despite nearly two decades of investigation. The leading candidates, Varroa mites and the viruses they carry, neonicotinoid and other pesticide exposures, poor nutrition from monoculture forage, pathogens such as Nosema, and interactions among all of these, each explain some collapses and fail to explain others, and the syndrome's defining sign, workers vanishing while brood and stores remain, resists a clean single-agent account.

What Would Settle It Controlled studies able to reproduce the specific abandonment syndrome under defined combinations of stressors, or field epidemiology strong enough to assign relative weights to the candidate factors rather than merely listing them.

Expertise Needed Entomology, Agroecology, Toxicology

Question posed in Colony Collapse Disorder (Wikipedia), Possible causes section; multifactorial explanations.

Open Bengal Famine of 1943

Why It Is Open Amartya Sen's entitlement-failure analysis holds the 1943 famine was a distributional and wartime policy failure rather than an absolute food shortage, while death toll estimates themselves range from 0.8 to 3.8 million, with Cormac O Grada putting scholarly consensus near 2.1 million; the atlas records both the mechanism and the count as unsettled rather than adopting one figure.

What Would Settle It A reconciled demographic reconstruction of wartime Bengal mortality that scholars broadly accept, and agreement on how much of the shortfall was genuine crop failure against wartime denial policy and market failure.

Expertise Needed Economic history and historical demography

Question posed in Amartya Sen (Wikipedia), Poverty and Famines (1981) section.

Open Great Chinese Famine

Why It Is Open Death toll estimates range roughly from 15 to 55 million depending on source and method; researcher Basil Ashton notes weather worsened the harvest but says it is impossible to assess how much responsibility belongs to policy against drought and flooding, and the government's own account emphasizes natural disaster over policy.

What Would Settle It Full access to Chinese demographic and agricultural archives from 1958 to 1962 and an accepted method for separating policy-driven from weather-driven crop loss.

Expertise Needed Demography and Chinese economic history

Question posed in Great Leap Forward (Wikipedia), Contributing factors section.

Open Collectivization in the Soviet Union

Why It Is Open Historians remain divided: some conclude Stalin deliberately engineered the famine to eliminate a Ukrainian independence movement, while others hold it was primarily the unintended consequence of rapid Soviet industrialization and forced collectivization applied across grain-growing regions generally, not Ukraine alone.

What Would Settle It Full, unrestricted access to Soviet-era planning and requisition archives and a consensus method for distinguishing deliberate targeting from general policy failure.

Expertise Needed Soviet history

Question posed in Holodomor (Wikipedia), Causes section.

Open Apiculture

Why It Is Open Sources disagree on both the date and the place. Beeswax residue in Neolithic pottery pushes organized use of hive products into Anatolia and North Africa by the seventh to ninth millennium BCE, while the earliest unambiguous depictions of managed, tended hives come only from Egyptian tomb art around 2500 BCE. Some researchers argue for two independent centers of invention, in Egypt and Anatolia, rather than a single origin, since no continuous evidence links the two.

What Would Settle It Additional securely dated archaeological finds of hive structures or beeswax use bridging the gap between the early Neolithic residue evidence and the first unambiguous Egyptian hive depictions, ideally with clear stratigraphic dating linking the two regions or ruling one out as independent.

Expertise Needed Archaeology

Question posed in Beekeeping (Wikipedia), Early history section.

Open Homestead Act of 1862

Why It Is Open About forty percent of filers completed the process to a final title, but historians disagree sharply on how much of that total reflects manipulation by land companies, cattle ranchers and speculators using dummy entrymen, against ordinary settlers who simply failed or gave up. Earlier scholarship stressed widespread fraud; more recent work argues fraud was a comparatively minor element.

What Would Settle It A systematic accounting of surviving General Land Office case files distinguishing contested, canceled and fraud-flagged claims from ordinary relinquishments across the full span the act was in force, rather than the regional case studies the debate currently rests on.

Question posed in Homestead Acts (Wikipedia), Issues and concerns section.

Open Sericulture

Why It Is Open The legendary account credits Empress Leizu with discovering silk cultivation in one moment around 2700 BCE, while archaeological finds, a carved ivory silkworm figure at Nancun and silk residues at other Neolithic sites, push evidence of the practice back roughly 5,400 to 5,500 years, centuries before any written record, leaving no way to confirm whether a single origin event occurred or the practice simply accumulated.

What Would Settle It Additional dated archaeological finds of silkworm cultivation across Neolithic Yellow River sites, or genetic dating of the domesticated silk moth's divergence from its wild ancestor, could narrow the window and test whether a single domestication event or several gradual ones occurred.

Expertise Needed Archaeology and archaeogenetics

Question posed in Sericulture (Wikipedia), History section.

Open Desertification

Why It Is Open Satellite vegetation studies since the 1980s show the Sahel partly regreening in wetter years, complicating a simple story of runaway human-caused desert advance, while heavily grazed and continuously tilled zones keep degrading even in wet years, so researchers read the same record differently depending on which zones and years they weight.

What Would Settle It Long-run, zone-by-zone studies separating rainfall-driven vegetation change from land-management effects, ideally paired with soil-condition data rather than vegetation greenness alone, would let the two drivers be weighed apart rather than argued as a single trend.

Expertise Needed Climatology and agroecology

Question posed in Desertification (Wikipedia), Causes section.

Open Cacao

Why It Is Open Two real, peer-reviewed lines of evidence disagree. Archaeological and residue evidence from the Santa Ana-La Florida site places cacao domestication in the upper Amazon (Mayo-Chinchipe culture, present-day Ecuador) at least 5,300 years ago, with cacao later introduced to Mesoamerica. A 2018 genomic study of cultivated cacao trees instead concluded that every domesticated cacao tree today descends from a single domestication event roughly 3,600 years ago somewhere in Central America, which would leave the older Amazonian material outside the domesticated lineage that survived. Neither study has been overturned by the other.

What Would Settle It A direct ancient-DNA comparison between cacao remains recovered from Santa Ana-La Florida and the genomic reference set the 2018 study built its single-origin tree from, which would show whether the upper-Amazon material is ancestral to, or a side branch from, the lineage that was actually domesticated.

Expertise Needed Archaeobotany / population genomics

Question posed in Cacao Tree (Wikipedia), Domestication section.