Lambda-CDM cannot explain the origin of the matter-antimatter asymmetry observed in the universe: why does ordinary matter vastly outnumber antimatter when the laws of particle physics appear to treat them symmetrically? The standard Big Bang should have produced equal amounts of matter and antimatter, which would annihilate completely, leaving only radiation. Proposed solutions (leptogenesis, electroweak baryogenesis, GUT baryogenesis) all require physics beyond the Standard Model and introduce additional fine-tuning. The Sakharov conditions for baryogenesis require CP violation, baryon number violation, and out-of-equilibrium conditions, yet Lambda-CDM cannot naturally provide all three simultaneously in a manner that explains the observed asymmetry without new particles or interactions (Sakharov 1967; Cline 2006). SCT must explain why baryons outnumber antibaryons from first principles without invoking undiscovered particles.