An explanation of Artificial Narrow Intelligence (ANI), Artificial General Intelligence (AGI), and artificial superintelligence (ASI).

An analysis of how AI development differs from historical human progress.

Is this the 2015 article you were looking for? If not, please tell me:

A look at the key players and research centers focusing on Artificial Intelligence.

are they (e.g., astronauts, a band, sci-fi characters)? What is the topic of the blog post? I can refine the search to get you exactly what you need. The AI Revolution: The Road to Superintelligence

If you are looking for a deep dive into how AI was expected to change the world as of 2015, this article provides a detailed perspective.