But one potential contributing factor comes from a fascinating piece in National Affairs by Marc Dunkelman, who fears the winnowing out of so-called "middle-tier relationships" for the American citizen.
This says that the winnowing of the gene pool, which drives evolution, can favour or destroy entire social groups as single entities, as well as working at the level of individual organisms.
The intense winnowing process guarantees that those admitted to the institute are smart and hardworking.
Now, while this is a great situation for a whisky aficionado, it does make the job of winnowing down the list difficult, and some awfully good drams had to be left out.
Many talent searches will be conducted by software, especially the initial winnowing, so you want to make sure your name pops up when relevant keywords are searched.
But exposure to global markets has the necessary winnowing effect.
The erudition of John Julius Norwich, Cooper's son, may have led him to assume that the only editing necessary was a winnowing of the entries.
As it did when it was part of Pitney Bowes, Imagistics reviews 80 products a year from manufacturers like Panasonic and Minolta, winnowing the list down to 10.
In the yellow fields women were winnowing while children bundled and stacked the sheaves of maize.
Also scoring high in voter involvement was Iowa, whose caucuses play a vital role in winnowing down the early field of candidates.
Pension funds also have been emboldened by the steady rise of commercial-property values since 2009 and a winnowing of some of the worst-performing funds.
Mr. Bashir said Pakistan was looking at winnowing back the presence of U.S. forces in Pakistan, a threat first made in the wake of public anger at the shooting dead of two armed Pakistani men in Lahore in January by Raymond Davis, a contractor for the Central Intelligence Agency.
The super-angel activity contrasts with the rest of the venture industry, which is winnowing out after a decade of poor returns amid a lackluster initial-public-offering market for start-ups.
The markets are perfectly capable of winnowing things out on their own, and have already created a dramatic reduction in US greenhouse gas emissions thanks to the increased use of natural gas in power generation.
When the FBI denies a gun purchase under a background check, that starts a winnowing-down process aimed at sorting out who's potentially dangerous in the large pool of applicants who are turned down for a variety of reasons.
The company has tried to be more disciplined, winnowing down its games pipeline to focus on churning out a lower number of high-quality games.
Krueger seems to think that the namesake of his chart achieved it when there was a balance of a winnowing gap of equality and more easily enabled social mobility.
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