Genes dictate everything - including our species' tendency to experiment endlessly.
Besides, if nature is everything and nurture is irrelevant, then why should anyone care about family values? Although allied politically with the religious right, this band of Milton Friedmanites are almost too attached to evolutionary theory.
Darwin is constantly invoked to justify the free market system: Rational self-interest is an innate strategy that capitalism simply reflects ("greed is adaptive").
The political landscape is splintering into ever more precise ideological niches, even as technology and science muddy the nature-nurture waters.
Knee-jerk reactions just aren't what they used to be.