It is plain that, _a priori_, another explanation is conceivable. If a people like the Andamanese, or the Australian tribes whom we have studied, had such a conception as that of Puluga, or Baiame, or Mungan-ngaur and then, _later_, developed ancestor-worship with its propitiatory sacrifices and ceremonies, ancestor-worship, as the newest evolved and infinitely the most practical form of cult, would gradually thrust the belief in a Puluga, or Mungan-ngaur, or Cagn into the shade. The ancestral spirit, to speak quite plainly, can be 'squared' by the people in whom he takes a special interest for family reasons. The equal Father of all men cannot be 'squared,' and declines (till corrupted by the bad example of ancestral ghosts) to make himself useful to one man rather than to another. For these very intelligible, simple, and practical reasons, if the belief in a Mungan-ngaur came first in evolution, and the belief in a practicable bribable family ghost came second, the ghost-cult would inevitably crowd out the God-cult.[33] The name of the Father and Maker would become a mere survival, _nominis umbra_, worship and sacrifice going to the ancestral ghost. That explanation would fit the state of religion which Mr. Im Thurn has found, rightly or wrongly, in British Guiana. But, if the idea of a universal Father and Maker came last in evolution, as a refinement, then, of course, it ought to be the newest, and therefore the most fashionable and potent of Guianese cults. Precisely the reverse is said to be the case. Nor can the belief indicated in such names as Father and Maker be satisfactorily explained as a refinement of ancestor-worship, because, we repeat, it occurs where ancestors are not worshipped. These considerations, however unpleasant to the devotees of Animism, or the ghost theory, are not, in themselves, illogical, nor contradictory of the theory of evolution, which, on the other hand, fits them perfectly well. That god thrives best who is most suited to his environment. Whether an easy-going, hungry ghost-god with a liking for his family, or a moral Creator not to be bribed, is better suited to an environment of not especially scrupulous savages, any man can decide. Whether a set of not particularly scrupulous savages will readily evolve a moral unbribable Creator, when they have a serviceable family ghost-god eager to oblige, is a question as easily resolved.