nature

'But in the case of an island, or of a country partly surrounded by barriers, into which new and adapted forms could not freely enter, we should then have places in the economy of nature which would assuredly be better filled up, if some of the original inhabitants were in some manner modified; for, had the area been open to immigration, these same places would have been seized on by intruders. In such case, every slight modification, which in the course of ages chanced to arise, and which in any way favoured the individuals of any of the species, by better adapting to their altered conditions, would tend to be preserved; and natural selection would thus have free scope for the work of improvement.'
darwin | on natural selection | immigration | society |

'Fair is foul, and foul is fair.'
shakespeare | macbeth | nature