Eric Foreman goes to Africa primarily because his actor, Topher Grace, chose to leave That '70s Show, leading the character to pursue a teaching career there.
The Narrative Behind Eric's Departure
The decision for Eric Foreman to move to Africa at the conclusion of Season 7 was a direct consequence of the series' star, Topher Grace, expressing his desire to depart from the show. To account for the absence of his character, the storyline was crafted to send Eric away.
Eric's Purpose in Africa and Subsequent Developments
Within the show's narrative, Eric's reason for relocating to Africa was to pursue teaching. This gave his character a new direction and a logical explanation for his departure from the main group in Point Place.
While Eric was abroad, his long-distance relationship with Donna Pinciotti eventually dissolved. It was later revealed in the middle of Season 8 that their romance had fizzled out, resulting in Eric unceremoniously ending their relationship.
