Final answer:
Janie left with Joe Starks in 'Their Eyes Were Watching God' because she saw in him the hope of a more fulfilling life, escaping her loveless marriage to Logan Killicks.
Step-by-step explanation:
In the book Their Eyes Were Watching God, Janie was eager to leave with Joe Starks (Jody) because she believed he represented the promise of an exciting and more fulfilling life. Unlike her current situation with Logan Killicks, Joe was ambitious, spoke of grand plans for his future, and he promised Janie a position of respect and involvement in the community life he planned to build. Janie admired Joe's vision and saw him as an escape from her loveless marriage, as Joe promised her a partnership and involvement in the social and political life of the new town he aimed to shape.