Planet of the Damned
"Of course I don't think about them," Brion retorted. "Why should I? I can't change the past."
"But you can change the future!" Ihjel said. "You owe something to the suffering ancestors who got you where you are today. If Scientific Humanism means anything more than just words to you, you must possess a sense of responsibility. Don't you want to try and pay off a bit of this debt by helping others who are just as backward and disease-ridden today as great-grandfather Troglodyte ever was?"
The hammering on the door was louder. This and the drug-induced buzzing in Brion's ear made thinking difficult. "Abstractly, I of course agree wi