You see from Dawkins’ perspective consciousness is created by biology, therefore, it cannot have any affect on biology. This is the strictly materialistic view. However, there is evidence which suggests this might be incorrect.
For example, stress is a major killer. It leads to high blood pressure, heart disease, and there is even some evidence that it can cause or exacerbate cancer. But, if Dawkins’ theory is correct and biology controls consciousness and not the other way around, then we should not be able to affect our own biology through sheer will. And yet, through relaxation techniques we can lower our blood pressure. We can make a conscious decision to exercise or reduce our caffeine intake to lower our stress levels. These are common conscious decisions which alter our physiology.
"There is no centre of the universe! According to the standard theories of cosmology, the universe started with a "Big Bang" about 14 thousand million years ago and has been expanding ever since. Yet there is no centre to the expansion; it is the same everywhere. The Big Bang should not be visualised as an ordinary explosion. The universe is not expanding from a centre into space, rather, the whole universe is expanding and it is doing so equally at all places, as far as we can tell"
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