The question of meaning goes all the way down: if human life as a whole is meaningless, so is everything that occurs or belongs within it. Since that's not a thought it is easy to live with, there is good reason to search for life's meaning.

An abiding and central concern of philosophy and religion alike is the fear that the world is alien to human beings, that nature is, in Hegel's words, 'out and out other' to 'spirit'. It's easy enough to see how 'constructivist' or 'humanist' conceptions are efforts to dispel this fear.

It would be through individual effort, inspired perhaps by reading Nietzsche's books, that the Overman might emerge, not through social or educational engineering.

Nietzsche's 'perspectivalism' was expressly directed against the 'laughable juxtaposition of "man and world"'. But 'absolutist' accounts, too, typically try to demonstrate that human beings are integral components of the world these accounts articulate - that, for example, we are simply material bodies subject to the same natural processes as everything else.

What impressed me about Plato and Sartre was their conviction that we should live our lives in the light of big truths about reality and human existence.

I don't think we should just 'muddle through' and ignore the question of life's meaning. Or better, perhaps, I don't think it is a question that can be ignored once the business of asking about the worth and significance of what one is doing - one's work, one's pleasures, one's ambitions and so on - has got going. You can't at any point stop the urge to ask Tolstoy's questions, '... and then what?', 'What's the point of that?'.

The focus of environmental ethics should indeed be on the virtues and how these inform our relationship to natural environments.