There are broader issues concerning the ways that societies make war, the appropriateness of particular political systems for mass conflict and the efforts to mobilise technical and intellectual resources, which might well have provided a more coherent frame through which to test the hypothesis that the two wars should be treated as one.

ECONOMIST: 20th-century history

But our resilience is not infinite, and the question remains as to whether our moral resources and intellectual clarity have been degraded to the point that we are vulnerable as never before.

CENTERFORSECURITYPOLICY: The past, and the present

If you lack the abilities or resources to develop your own astounding intellectual content, a reasonable alternative is curating third-party content.

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Developing new hardware, especially in the relatively immature wearable space, takes a lot of time, money, and intellectual resources.

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Mr Rose, who as an historian of the book belongs to a growing sub-discipline, has written a masterly account of the way in which the British working classes (and that term must remain emphatically plural, since Mr Rose moves from the landlocked rural poor, to London's Jewish East End, to the clattering factory towns of north-western England) have taught, soothed and entertained themselves through their own intellectual resources.

ECONOMIST: Cultural history

The company has an advantage there, as search now requires vast computing resources that no startup seems able to match and Google is still in a good place to address the intellectual challenges of making search better.

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