History has got a lot to do with unique circumstances under certain particular cases and grand theories will always find counter cases. I don't think that people whose expertise lies in one thing should try to make grand theories about something (a) where it's very hard to get the evidence to prove that you're right and (b) where it's much too easy to make up stories that seem right.

In fact perhaps the only law in biology is that all flesh is mortal and all species become extinct eventually.

I am a taxonomist, I work in the descriptive, narrative sciences of natural history. Unfortunately there is this status ordering from physics, the queen of the sciences up on top, down through a bunch of squishy subjects, ending up with sociology and psychology on the bottom. Palaeontologists are not much above that in their conventional ordering.

The social scientist is in a difficult, if not impossible position. On the one hand there is the temptation to see all of society as one's autobiography writ large, surely not the path to general truth. On the other hand, there is the attempt to be general and objective by pretending that one knows nothing about the experience of being human, forcing the investigator to pretend that people usually know and tell the truth about important issues, when we all know from our own lives how impossible that is.

I assume the same problem exists in Australia as in America of back-biting and jealousy and parochialism among disciplines - there are the scientists, and there are the humanities people, and there are chemists and the physicists and everybody snipes at everybody else and inter-disciplinary communication is rare. But it's very precious and necessary.

I think people who worry about planetary health on geological scales are totally misguided, that's not the point at all.

History has got a lot to do with unique circumstances under certain particular cases and grand theories will always find counter cases. I don't think that people whose expertise lies in one thing should try to make grand theories about something (a) where it's very hard to get the evidence to prove that you're right and (b) where it's much too easy to make up stories that seem right.