Answer:
The structure that was used to make the argument more effective in this article is the;
- Proposition/Support organization
Text structure refers to the way a text is organized in order to make its content more appealing to readers.
At the beginning of this text, the author makes the proposition that the right amount of "social situation" is what an individual needs to transform him from good to bad.
Going further, he supported this argument with some research works conducted by Philip G. Zimbardo who formerly headed APA, and some other researchers.
For example, an experiment conducted by John Watson in 1974 showed that in anonymous situations, people tended to commit evil.