What was “grokking”? He had been using the word for a week – and he didn’t grok it. But what was “Man”? A featherless biped? God’s image? Or a fortuitous result of “survival of the fittest” in a circular definition? The heir of death and taxes? The Martians seemed to have defeated death, and they seemed not to have money, property, nor government in any human sense – so how could they have taxes?