Those are all questions with a variety of answers historical and current. You could have looked them up. But I take it that you mean them rhetorically, with a p

Those are all questions with a variety of answers historical and current. You could have looked them up. But I take it that you mean them rhetorically, with a point something like, "since I, a smart guy on the Internet can't think of a clear answer in two minutes, there's no point in anybody looking at anything that harms people I don't care about." But again, I say that shouldn't stop us from grappling with harms. A good example is food safety regulation. Are there clear, perfect answers? No. But we muddle through anyhow, doing our best to balance many factors. And we should.