1 Maynard Smith, J. and Szathmáry, E. (1995) The Major Transitions in Evolution, W.H. Freeman

2 Dawkins, R. (1998) Climbing Mount Improbable, W.W. Norton

3 Jackendoff, R. (1999) Parallel constraint-based generative theories of language. Trends Cognit. Sci. 3, 393-400

4 Jackendoff, R. (1999) Possible stages in the evolution of the language capacity. Trends Cognit. Sci. 3, 272-279

5 Cavalier-Smith, T. (1991) The evolution of cells. In Evolution of Life (Osawa, S. and Honjo, T., eds), pp. 271-304, Springer-Verlag

6 Pinker, S. (1994) The Language Instinct, William Morrow

7 Deacon, T.W. (1997) The Symbolic Species, W.W. Norton

8 Maynard Smith, J. and Szathmáry, E. (1999) The Origins of Life, Oxford University Press

9 Ruhlen, M. (1994) The Origin of Language, John Wiley & Sons

10 Marslen-Wilson, W. and Tyler, L.K. (1998) Rules, representations, and the English past tense. Trends Cognit. Sci. 2, 428-435

11 Paterson, S.J. et al. (1999) Cognitive modularity and genetic disorders. Science 286, 2355-2358