Hence the best thing that we can do is to evolve the lower manas, manas deeply tinged with kama.
Out of that Fourth Race, then, were selected the people who showed most plainly the budding of this intelligence which was needed, the messengers of the Manu striking a note which attracted those in whom this lower manasic principle was more highly developed than among their comrades and peers.

Gradually from different nations groups of men and women gathered round the messengers of the Manu, who then began to lead them away from their own people, from their own nation, from all their surroundings, in order to seek the appointed place where the Manu was grouping those on whom the great experiment was to be made for the second time.

Slowly and gradually they were thus gathered together out of the nations into which the fifth sub-race of the Fourth Race had spread.

And the flower of those nations, attracted by the key-note struck by the messengers, gradually gathered round the Manu, and became the material, the nucleus, of the new Root Race.

As you know, He took them far away to the Sacred Land, shutting them away from the masses of the Fourth and Third Race peoples, and dividing them by physical barriers from all that might contaminate and stain.
Very, very different were those people from the generations which thousands upon thousands of years later were to spring from them in physical succession; rather, to the people about them were they folk who were developed in an uncongenial fashion, people who were by no means looked up to and admired in the nations amongst whom they dwelt, amongst whom they had grown up.