Mobility is a relatively scarce social capacity and is defined by its opposite, immobility, for whenever some things or people are mobile, others are moored, their movements restricted or difficult.

流动性是一个相对稀缺的社会能力，但它是用它的反面来定义的，固定性，当一些事物或人在移动，其他人却在停泊，他们的动作收到了限制或是困难的。

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This allows him to touch plausibly on many hot- button themes the erosion of social capital, entrenched inequality and social immobility but it stops short of a full explanation of them.

ECONOMIST: Social change