By the year 2718, Earth had entered a period defined by irreversible environmental decline, geopolitical fragmentation, and the consolidation of remaining technological capabilities into a small number of state and intergovernmental enclaves. While the planet remained broadly habitable, its capacity to sustain large, complex civilizations had been severely reduced compared to earlier centuries.
Global climate systems had shifted beyond the range of Holocene variability. Average temperatures were significantly elevated, with equatorial and subtropical regions experiencing prolonged wet-bulb conditions that rendered outdoor activity hazardous or impossible without technological assistance. Desertification had expanded across continental interiors, while coastal regions were heavily reshaped by sea-level rise. Formerly dense population centers along shorelines had either been abandoned or transformed into fortified arcologies and elevated infrastructure networks. Ocean ecosystems were heavily degraded, with widespread anoxic zones and reduced biodiversity affecting global food chains.
Human population levels had declined from their peak, stabilizing at a fraction of earlier figures due to a combination of resource scarcity, conflict, and reduced agricultural output. Food production relied heavily on controlled-environment systems, including vertical agriculture and synthetic nutrient manufacturing, concentrated within politically stable zones. Outside these regions, subsistence strategies varied widely, ranging from localized agroecology to opportunistic scavenging within the ruins of prior urban-industrial systems.
Technological capacity in 2718 was unevenly distributed. Advanced manufacturing, artificial intelligence, and spaceflight capabilities persisted, but were largely restricted to a limited number of state actors and corporate-state hybrids. Among these, the People’s Republic of China maintained one of the most intact industrial and scientific bases, enabling the construction and launch of the PRSS Nuwa in early 2718. The United States, largely diminished from its form early in the millenia, but still technologically capable, followed shortly thereafter with the USSF Eden, launched approximately one month later.
Political organization at the global level had largely dissolved. Instead, power was exercised through regional blocs, fortified megacities, and mobile resource networks. International cooperation persisted only in narrow, strategic contexts—most notably in the exchange of scientific data related to off-world exploration and survival contingencies. The launch of interstellar vessels represented a rare convergence of long-term planning and resource allocation, driven by the recognition that Earth’s long-term habitability was in decline.