There are many points at which such checks can be exerted. Everybody accepts that, even where there may be no theoretical boundaries, not everything that can be done actually should be done. In the past, there have been many occasions when scientists themselves have objected to certain developments. We live in an open society in which the media and the public have strong voices.

People will not buy what they don’t want, or consider not worth the price, and companies will not (for long) make products they cannot sell.

We all, by our purchases, our votes and by voicing our opinions contribute to decisions on major issues.

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