Complex sentence: From his background in finance, and working as a futures and options trader, Wales developed an interest in game theory and the effect of incentives on human collaborative activity--he identifies this fascination as a significant basis for his developmental work on the Wikipedia project.
Split into simpler sentences: From his background in finance, and working as a futures and options trader, Wales developed an interest in game theory and the effect of incentives on human collaborative activity. He identifies this fascination as a significant basis for his developmental work on the Wikipedia project.