Falling in love indicated that your genes were complementary to those of the loved one. It told you nothing about when your personalities and sexualities were compatible.

The real world is far too complex and unpredictable to make something like the idea of humanity controlling its own evolution or engineering itself - well, I wouldn't say impossible but it should be approached with a degree of caution.

I enjoyed Old Man's War immensely. A space war story with fast action, vivid characters, moral complexity and cool speculative physics, set in a future you almost want to live into, and a universe you sincerely hope you don't live in already.

Of all the sciences, astronomy was the one the superstitious liked least.

The idea of determinism combined with complete human responsibility struck me as very hard to reconcile with an idea of justice, let alone mercy.

Science fiction made me aware of how big and strange the universe was, leaving aside the whole question of aliens.

What if capitalism is unsustainable, and socialism is impossible?