Weren't British (or at least their ancestors) generally dissatisfied with their lot in the first place and that's why they wrote the Magna Carta? I don't know

Weren't British (or at least their ancestors) generally dissatisfied with their lot in the first place and that's why they wrote the Magna Carta? I don't know that dissatisfaction and mistrust is genetic but I'm guessing it probably gets passed on culturally, at least to some extent.