I have a question for you. How is Panspermia related to Exogenesis?
Neither suggest any motive or direction for any of it.
You realize that the concept was well discussed in science fiction of the 1920s and 1930s.
I saw your suggestion regarding Wikipedia. Frankly, I rarely use that site preferring instead the popular science press - Scientific American, Discover, and Science News. If a piece looks interesting and readable, I'll go to the library to read the journal.