The Great Bifurcation, The Divided World

The Core Premise: Over 750 years, genetic engineering technology evolved from medical treatment into comprehensive human enhancement, creating "The Great Bifurcation"-a fundamental divide between:
Naturals (unmodified humans) who maintain traditional reproduction
Designed (genetically modified humans) who undergo extensive pre-birth optimization
The split occurred gradually across five eras (2090-present), beginning with disease elimination and expanding into full enhancement. What started as a medical choice became an identity, then a culture, and finally nearly separate species.
Each population developed distinct philosophies, social structures, and ways of life:
Naturals value authenticity, diversity, and earned achievement but face economic disadvantage and discrimination
Designed prioritize optimization and progress, enjoying health/longevity advantages but struggling with uniformity and existential questions
The populations coexist in complex interdependence-legally protected but socially segregated, economically interconnected but culturally divided, cooperating on some fronts while conflicting on others.
The Central Tension profound questions about humanity, authenticity, equality, and the ethics of genetic modification without taking a clear side, presenting both populations as having legitimate perspectives and real costs to their choices.
Multiple emerging trends (genetic divergence, political tensions, space colonization, a "Third Way" movement) leave the ultimate fate of divided humanity uncertain.