My kids are much more likely to know classmates who are openly gay than I was in the 1980s. (Actually, infinitely more likely.) For younger people, the idea of someone being gay is not the issue it was for their parents and grandparents.

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And all politicians know that the aged are far more likely to vote than the young.

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And those close friends are more likely to help someone with a job than a professional contact who someone does not know well.

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In his book Blink, Malcolm Gladwell says you are much more likely to find a new job, for instance, through people to whom you are weakly connected than those you know well.

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