What is the main idea of forged by fire

I don't know if this is the answer you are looking for but

The theme of forged by fire is courage. Throughout the book Gerald shows a huge amount of courage in the way he handles all the obstacles he and Angel go through. Angel also shows courage by not giving up on herself, and continuing to dance. "Angel loved Gerald all the more for being her protector"

Explanation:

answer; in the 1950s;

answer; (b) limited resource to satisfy virtually unlimited wants;