=212.= Upon the conflagration will follow the reconstruction of the world (παλιγγενεσία, _renovatio_), which will lead again to a conflagration; the period between one conflagration and the next being termed a ‘great year’ (περίοδος, _magnus annus_). The conception of the ‘great year’ was borrowed by the Stoics from the Pythagoreans[128], and leads us back ultimately to astronomical calculations; for a great year is the period at the end of which sun, moon and planets all return to their original stations[129]. The phenomena of the sky recur in each new period in the same way as before; and hence we readily infer that all the phenomena of the universe, including the lives of individuals, will recur and take their course again. Although this doctrine appears only slightly connected with the general Stoic system, it was an accepted part of it: and Seneca expresses an instinctive and probably universal feeling when he says that few would willingly repeat their past histories, if they knew they were so doing[130]. [Sidenote: Creation.] =213.= We have put off till the end of this chapter the discussion of the Stoic theory of Creation, because it is in fact one of the least defined parts of the system. According to the theory of the great year creation is not a single work, but a recurring event; and therefore in one sense the history of the universe has neither beginning nor end. It would however be a mistake to suppose that this point of view was always present to the minds of Stoic teachers. The question of the beginning of things is of primary importance to every philosophy, and the Stoics approached it from many points of view, popular, scientific, mythological and theological, and gave a number of answers accordingly. To the orthodox Stoic all these answers are ultimately one, though the language in which they are expressed differs greatly; whilst the critic of Stoicism would assert that they are derived from different sources and are fundamentally irreconcileable. Seneca suggests four answers to the question ‘Who made the universe?’ It may be an omnipotent deity; or the impersonal Logos; or the divine Spirit working in all things by tension; or (lastly) destiny, that is, the unalterable succession of cause and result[131]. These answers we may examine in order. [Sidenote: The golden age.]