7 Branch-Races make 1 Sub-Race
7 Sub-Races make 1 Root-Race
7 Root-Races make 1 World-Period
7 World-Periods make 1 Round
7 Rounds make 1 Chain-Period
7 Chain-Periods make 1 Scheme of Evolution
10 Schemes of Evolution make 1 Our Solar System

It is clear that the fourth root-race of the fourth globe of the fourth
round of a fourth chain-period would be the central point of a whole scheme
of evolution, and we find ourselves at the present moment only a little
past that point. The Aryan race, to which we belong, is the fifth root-race
of the fourth globe, so that the actual middle point fell in the time of
the last great root-race, the Atlantean. Consequently the human race as a
whole is very little more than half-way through its evolution, and those
few souls who are already nearing Adeptship, which is the end and crown of
this evolution, are very far in advance of their fellows.

How do they come to be so far in advance? Partly and in some cases because
they have worked harder, but usually because they are older egos--because
they were individualized out of the animal kingdom at an earlier date, and
so have had more time for the human part of their evolution.

Any given wave of life sent forth from the Deity usually spends a
chain-period in each of the great kingdoms of Nature. That which in our
first chain was ensouling the first elemental kingdom must have ensouled
the second of those kingdoms in the second chain, in the third of them in
the Moon-chain, and is now in the mineral kingdom in the fourth chain. In
the future fifth chain it will ensoul the vegetable kingdom, in the sixth
the animal, and in the seventh it will attain humanity.