Understanding what drives protein misfolding could unlock new approaches to preventing Alzheimer's disease and related neurodegenerative conditions. The persistent challenge has been identifying the fundamental forces that cause normally soluble proteins to aggregate into the toxic plaques characteristic of these disorders. Temperature-dependent solubility experiments with amyloid beta peptides demonstrate that hydrophobic interactions, rather than hydrogen bonding or electrostatic forces, represent the primary driver of fibril formation. When researchers systematically varied temperature conditions, they observed that amyloid beta aggregation follows patterns consistent with hydrophobic collapse—the same mechanism that causes oil to separate from water. This finding challenges previous assumptions about the relative importance of different molecular forces in amyloid assembly. The hydrophobic effect becomes stronger as temperature increases, explaining why protein aggregation accelerates under certain conditions and providing a mechanistic framework for understanding disease progression. This mechanistic insight carries significant implications for therapeutic development in neurodegeneration. Current drug discovery efforts have largely focused on disrupting hydrogen bonds or electrostatic interactions within amyloid structures. However, if hydrophobic forces dominate fibril stability, intervention strategies may need fundamental reorientation toward compounds that can interfere with hydrophobic collapse or enhance the aqueous solubility of aggregation-prone peptides. The temperature dependence also suggests environmental factors affecting body temperature could influence disease progression rates. While this represents important basic science advancing our understanding of protein misfolding diseases, translating these insights into effective treatments remains a substantial challenge. The work provides a clearer target for drug design but does not immediately resolve the complexity of preventing or reversing amyloid formation in living systems.