I think you might be right.
The most important statement in the US constitution is "Life, liberty and the pursuit of happiness". I could never imagine happiness being enshrined in the UK. Spiteful misery, yes. Vengeful cruelty - natch. And yet while they wrote those words, they were condemning thousands to death, slavery in the pursuit of other's greed. I can't think of a stronger argument that the constitution is a product of its context and that context (like all contexts) was blinkered, hypocritical and self serving.
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