Some stories do tear you apart, usually those where the violence is joined to some emphatically opposite quality, such as peace or tenderness.

NEWYORKER: Once Upon a Time

Levels of all these hormones are also known to be correlated, in the females of at least some species, with the quality of subsequent maternal behaviours such as bonding to newly born offspring.

ECONOMIST: Hormones and fatherhood

But HP is ahead in some areas, such as automated tools to test the quality of the customer's software, says IDC analyst Stephen Hendrick.

FORBES: OutFront

They concern management practices that at some point emerge and become popular, such as the old Total Quality Management, ISO9000 system or SixSigma.

FORBES: Management myths

NHS, some of which involve tricky compromises such as the trade-off between the quality of medical care and its cost.

ECONOMIST: National Health Service