The next stage of evolution is here Everyone will have a basic idea of Darwin’s theory of evolution, but does it still apply today? The theory of evolution by natural selection, first formulated in Darwin’s book “On the Origin of Species” in 1859. This is the process by which organisms change over time as a result of changes in heritable physical or behavioural traits. Changes that allow an organism to better adapt to its environment, which will help it survive. Does it still apply today? The answer is yes. ASD (Autistic Spectrum Disorder) could be the next example of evolution.