What I conceive the true significance of this particular change in opinions to be is set forth in the essay on "The biogenetic Law."
"Socialism: Positive and Negative"
Robert Rives La Monte
It is very curious to find, however, that St. Thomas, in his teaching with regard to the origin and development of the human being, says, almost exactly, what the most ardent supporters of this so-called fundamental biogenetic law proclaimed in recent years.
"Education: How Old The New"
James J. Walsh
We can evoke electricity at will from many different sources, but we can evoke life only from other life; the biogenetic law is inviolable.
"The Breath of Life"
John Burroughs