Ordinary Russians can be stirred by tangible worries such as welfare reform, but for most of them freedom is about foreign holidays and a new television, not politics.
Black populations across the world have at least a loose sense of their counterparts — descendants of slaves in Brazil and Haiti, products of migration in Western Europe — but "Strolling" makes their existences, their joys and worries, real in a tangible, addictive way.
One result has been a tangible increase in anxiety, with Londoners worrying about the risk of travel, the risk of going into crowded places or near areas which could be construed as "symbolic targets".
Suddenly, the prospect of autonomous vehicles looms as a tangible threat to traditional cars, and auto companies are plowing ahead with driverless experimentation, worried that if they don't they'll be left behind.
It makes a tangible difference.
"It involves absolute truth, a tangible asset.
And Sir John left a tangible legacy.
Solidarity is a tangible asset.
Truth is a tangible entity.
To become a tangible thing?
That's a tangible accomplishment.
