Take male strategies for success in the world. If you've got all the advantages, if you're attractive and clever and all of that, you will generally go for very high quality females.

'Temes' [technology-enhanced memes] don't care about us - they simply want to create more of themselves. Don't think we created the internet for our own benefit - think about temes spreading for themselves because they must.

Finally, we might decide that civilisation itself is worth preserving. In that case we have to work out what to save and which people would be needed in a drastically reduced population - weighing the value of scientists and musicians against that of politicians, for example...

Take male strategies for success in the world. If you've got all the advantages, if you're attractive and clever and all of that, you will generally go for very high quality females.

You start by copying other people's paintings or music or whatever. You get all of those skills before you branch out. Really creative people have a fantastic ability to copy things and then combine them in new ways. And whether we're talking about genes or memes, recombination is the real heart of creativity.

Parapsychology seems to be growing further away from the progress and excitement of the rest of consciousness studies.

Imagine a world full of brains, and far more memes than can possibly find homes. Which memes are more likely to find a safe home and get passed on again?