For the moment at least, the Darwinian period is past; we can no longer enjoy the comfortable assurance, which once satisfied so many of us, that the main problem has been solved - all is again in the melting pot. By now, in fact, a new generation has grown up that knows not Darwin. Is even then evolution not a scientifically ascertained fact? No! We must hold it as an act of faith because there is no alternative.
Source: Presidential Address of the Botanical Section of British Ass’n for the Advancement of Science, 1921
Contributed by: Zaady