Not in the way the word replace suggests. Ra said humans will go on being born and will always outnumber Raves, and that most people will keep living the designs we know, with small changes. He also forecast a slow decline in fertility and a falling world population later this century, which is the part that makes people read it as a replacement. Both sit in his material side by side. It is his cosmology, not a fact and not a medical statement, and nobody knows exactly how it unfolds.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
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