There may be such widespread agreement but the claim is
questionable. Its truth would be obvious only if electrical-biochemical
processes were known to obey a strict Laplacian determinism, but quantum
mechanics and "chaos" theory strongly indicate that this is not the
case. (One needs especially to note an appropriate combination of the
ideas of "chaos" applied to CLASSICAL mechanics and quantum theory.)
This neither refutes all types of determinism nor proves free will, but
it does make clear that materialism and free will are not necessarily
disjoint.
George L. Murphy