How do we know which subjects benefit society?

我们怎么知道哪些学科有益于社会？

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Volunteer activities are of tremendous benefit to both those in need and to the whole society.

志愿活动对有需要的人和对整个社会都有巨大的好处。

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Fully utilise their research to benefit all sectors of society.

充分利用他们的研究成果，造福社会各界。

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"Our job is to craft rules, as did Theodore Roosevelt,Woodrow Wilson and Franklin Roosevelt, that allow the society to get the benefit of these wonderful value-added financial innovations, while curtailing some of the abuses."

VOA: standard.2009.03.26

But it's hard to tell exactly where society comes down on the balancing the risk-benefit scale.

FORBES: Safety Vs. Efficacy

The Three Horseshoes in Charsfield, closed in May last year leading to the formation of a community benefit society which aims to re-open it.

BBC: Charsfield villagers aim to re-open Three Horseshoes pub

Well, now we know: There is a long-term benefit, economic and psychological, when society invests in the psychological well being of its young people.

FORBES: Investing In Psychological Well-Being Pays Off With Income Gains