The rise and fall of Darwin's second theory

Conclusion The difficulty of discussion between people brought up in different frameworks is to be admitted, Karl Popper writes. But nothing is more fruitful than such a discussion; than the culture clash which has stimulated some of the greatest intellectual revolutions.⁷¹ Certainly Kirby and Darwin were brought up in different cultures — Kirby with his Anglican-Tory orientation, Darwin with his Whig-liberal background — and certainly the clash generated some interesting theories; but it also resulted in the revival of Lamarck's discredited habit theory, which took another century of careful experimentation to weed out.