What do you think becomes of people when their civilization breaks up? Those who have brains and courage come through all right. Those that haven't are winnowed out.
10 seconds sound clip from the Gone with the Wind (1939) movie soundboard.
You can hear this line at 02:04:14 in the Blu-ray version of the movie.
Quote context
[...]
- They say Abe Lincoln got his start splitting rails.
- Just think what heights I may climb to, once I get the knack.
- The Yankees want 300 dollars more in taxes.
- What shall we do? What's to become of us?
- For heaven's sake, don't stand there talking nonsense at me when it's us who are being winnowed out!
- You're right. Here I am talking tommyrot about civilization, while your Tara is in danger.
- You've come to me for help, and I've no help to give you.
- You? A coward? What are you afraid of?
- Oh, mostly of life becoming too real for me, I suppose.
[...]