Adapting to climate change with science and politics
When sea levels rise at twice the global average rate, Pacific Island nations pay close attention to history. The coral fragments used to build Nan Madol's seawalls between the 10th and 15th centuries CE provide data about how societies adapt - or fail to adapt - when waters climb.
"apply ancient wisdom to modern challenges on our warming planet"
Through precise 230Th dating of 171 coral samples, scientists have mapped two critical construction phases at Nan Madol, Pohnpei, Micronesia. The first, from the 10th to 12th century, marked the rise of the Mwehin Sau Deleur (Saudeleur Dynasty). The second phase, from the late 12th to early 15th century, reveals increasing efforts to fortify against rising seas as El Niño patterns intensified.
The Tuvaluan word fenua carries weight as modern Pacific islands face similar challenges. Like the Saudeleur rulers before them, today's leaders must decide how to protect their communities when traditional defenses falter.
Climate patterns shape political power. When medieval Iceland's climate cooled, their parliament, the Althing, survived through flexibility - though civil war erupted, democratic institutions adapted rather than collapsed. At Nan Madol, by contrast, rulers staked their authority on controlling nature through monuments. As waters rose, their power eroded with their seawalls.
Modern food systems show parallel vulnerabilities. When harvests fail, nations often restrict exports and build stockpiles. But such actions, multiplied across countries, can accelerate system breakdown. The archaeological evidence from Nan Madol demonstrates how societies under environmental pressure often pour more resources into diminishing returns.
The coral dates at Nan madol reveal a telling pattern: the second construction phase required ever-larger harvests for higher seawalls that provided less protection. Today's nations face similar calculations as they weigh concrete barriers against rising seas.
And the pattern repeats across civilizations around the globe. The Maya constructed elaborate water management systems during favorable climate periods, but their political structure proved too rigid when severe extended droughts struck in the 9th century. Their divine kings, whose authority rested on controlling water resources, lost legitimacy as reservoirs ran dry.
Pacific knowledge offers guidance through terms like Kāinga (and its regional variants ʻāiga, ʻāiʻa, ʻāina, etc. which refer to the idea of homeland, residence, family, etc.) suggests possibilities beyond physical territory. Rather than rigid resistance or collapse, successful adaptation may require political structures that can transform while maintaining cultural continuity. And yes, that adaptation may also include displacement like the Mayas, and immigration as climate refugees.
The 230Th dating shows how quickly societies can change when environmental pressures mount. Modern Pacific nations pioneer new approaches, from managed retreat to regional cooperation. Our experiences may guide others struggling at the intersection of climate and governance.
In the end, successful adaptation appears to depend less on seawalls than on political systems flexible enough to evolve. The evidence lies preserved in coral-dated structures and ongoing fights, as nations work to apply ancient wisdom to modern challenges on our warming planet.
Huri Translations
Tel. +689 89 205 483
[email protected]
PO BOX 365 Maharepa
98728 Mo'orea
French Polynesia
N°TAHITI 876649
Social
