What has happened in Carton's personal and professional life that prompted him to come to France?

In Charles Dickens' "A Tale of Two Cities," Sydney Carton is portrayed as a disillusioned and dissipated lawyer, struggling with his feelings of worthlessness and regret over his wasted potential. His personal life is marked by a lack of meaningful relationships and a sense of failure, particularly in his unreciprocated love for Lucie Manette. Professionally, his decision to come to France is driven by the tumultuous events of the French Revolution, where he seeks to find redemption and purpose, ultimately leading to his self-sacrificial act to save Lucie's husband, Charles Darnay. This journey reflects his desire to make a noble impact despite his flawed past.