Over the last four decades arguments for and against the claim that creative hypothesis formation is based on Darwinian 'blind' variation have been put forward. This paper offers a new and systematic route through this long-lasting debate. It distinguishes between undirected, random, and unjustified variation, to prevent widespread confusions regarding the meaning of undirected variation. These misunderstandings concern Lamarckism, equiprobability, developmental constraints, and creative hypothesis formation. The paper then introduces and develops the standard critique that creative hypothesis formation is guided rather than blind, integrating developments from contemporary research on creativity. On that basis, I discuss three compatibility arguments that have been used to answer the critique. These arguments do not deny guided variation but insist that an important analogy exists nonetheless. These compatibility arguments all fail, even though they do so for different reasons: trivialisation, conceptual confusion, and lack of evidence respectively. Revisiting the debate in this manner not only allows us to see where exactly a 'Darwinian' account of creative hypothesis formation goes wrong, but also to see that the debate is not about factual issues, but about the interpretation of these factual issues in Darwinian terms.

The article addresses the question whether culture evolves in a Lamarckian manner. I highlight three central aspects of a Lamarckian concept of evolution: the inheritance of acquired characteristics, the transformational pattern of evolution, and the concept of directed changes. A clear exposition of these aspects shows that a system can be a Darwinian variational system instead of a Lamarckian transformational one, even if it is based on inheritance of acquired characteristics and/or on Lamarckian directed changes. On this basis, I apply the three aspects to culture. Taking for granted that culture is a variational system, based on selection processes, I discuss in detail the senses in which cultural inheritance can be said to be Lamarckian and in which sense problem solving, a major factor in cultural change, leads to directed variation.

I argue that creativity is compatible with determinism and therefore with naturalistic explanation. I explore different kinds of novelty, corresponding with four distinct concepts of creativity – anthropological, historical, psychological and metaphysical. Psychological creativity incorporates originality and spontaneity. Taken together, these point to the independence of the creative mind from social learning, experience and previously acquired knowledge. This independence is nevertheless compatible with determinism. Creativity is opposed to specific causal factors, but it does not exclude causal determination as such. So creativity can be naturalized.

Recent philosophical work on the concept of human nature disagrees on how to respond to the Darwinian challenge, according to which biological species do not have traditional essences. Three broad kinds of reactions can be distinguished: (1) conservative intrinsic essentialism, which defends essences in the traditional sense, (2) eliminativism, which suggests dropping the concept of human nature altogether, and (3) constructive approaches, which argue that revisions can generate sensible concepts of human nature beyond traditional essences. The different constructive approaches pick out one or two of the three epistemic roles that are fused in traditional essentialist conceptions of human nature: descriptive (descriptivism), explanatory (explanativism), definitional (taxonomic relationalism), or explanatory and definitional (property cluster essentialism). These turns towards diverging epistemic roles are best interpreted pluralistically: there is a plurality of concepts of human nature that have to be clearly distinguished, each with a legitimate role in respective scientific contexts.

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