Full Idea
By the second century CE Aristotelianism and Platonism had begun to eclipse Stoicism, and by the end of the third century Stoicism had no followers. All philosophers now opted for some form of Platonism, but including Aristotle's ethical principles.
Gist of Idea
In the third century Stoicism died out, replaced by Platonism, with Aristotelian ethics
Source
Michael Frede (A Free Will [1997], 04)
Book Reference
Frede,Michael: 'A Free Will' [Univ of California 2011], p.49
A Reaction
The idea that Aristotelian ethics dominated that period is new to me. Stoic influence remained strong in Augustine, and hence in Christianity.