While I do not suggest that humanity will ever be able to dispense with its martyrs, I cannot avoid the suspicion that with a little more thought and a little less belief their number may be substantially reduced.

We do not know, in most cases, how far social failure and success are due to heredity, and how far to environment. But environment is the easier of the two to improve.

Until politics are a branch of science we shall do well to regard political and social reforms as experiments rather than short-cuts to the millennium.

John B. S. Haldane Quotes