Conversation so far:
who proposed a theory of evolution based on acquired characteristics
This idea of the inheritance of acquired characteristics or soft inheritance is inaccurately named after the French biologist Jean-Baptiste Lamarck; however, it was known from the classical era onwards.
what is lamarckism in contrast of?
The opposite of Lamarkism is Darwinism.
who developed darwinism?
Charles Darwin developed Darwinism.
what does darwinism state?
Darwinism states all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.

Question: where was the theory published?
Self-contained rewrite: where was the darwinian theory published?