An invention or new combination can be successful only if all if the elements necessary for the recombination are present in the culture.


MAN'S RISE TO CIVILIZATION (ed. 1968)


An invention or new combination can be successful only if all if the elements necessary for the recombination are present in the culture.

An invention or new combination can be successful only if all if the elements necessary for the recombination are present in the culture.

An invention or new combination can be successful only if all if the elements necessary for the recombination are present in the culture.

An invention or new combination can be successful only if all if the elements necessary for the recombination are present in the culture.