Domain Walls

Domain Walls are boundaries between regions of space whose symmetry broke independently and in different ways, the planar defects that separate neighboring vacuum states after symmetry breaking. The book uses them as an observational test between two accounts of where orientation comes from. If symmetry breaks by overflow, regions break independently and disagree, producing domains, defects and walls between them; if instead the universe inherited its axis from its parent, there is a single global orientation and no domain structure at all. The two mechanisms are therefore distinguishable, and the book notes that the absence of rotational domain walls is a prediction its framework already makes. Domain walls sit within the book's symmetry-breaking cascade, from the primary breaking that yields 3+1 dimensional spacetime to the secondary breaking that separates the fundamental forces, alongside the other topological defects that recursive field evolution can leave behind. They connect to Topological Defect Network Evolution, Recursive Defect Networks, Monopoles, Textures, Hierarchical Symmetry Reduction, Secondary Breaking and Recursive Field Evolution.