- Charles Darwin's Philosophy of Life
- Charles Darwin's Personal Opinions
- Charles Darwin's Opinions on Scientific Issues
Animals
Animals, whom we have made our slaves, we do not like to consider our equal.
Experimentation
Physiological experiment on animals is justifiable for real investigation, but not for mere damnable and detestable curiosity.
Religion
I am a strong advocate for free thought on all subjects, yet it appears to me (whether rightly or wrongly) that direct arguments against Christianity and theism produce hardly any effect on the public; and freedom of thought is best promoted by the gradual illumination of men's minds, which follows from the advance of science.
