In Harper Lee’s novel “To Kill a Mockingbird,” the character Atticus Finch decides to defend Tom Robinson, a Black man who has been falsely accused of raping a white woman. Atticus’s decision to take on Tom’s case is motivated by a number of factors.

Firstly, Atticus believes that it is his duty as a lawyer to defend those who cannot defend themselves. Tom is a poor, uneducated man who has been wrongly accused of a serious crime, and Atticus recognizes that he needs legal representation in order to have a fair trial. As a lawyer, Atticus feels a moral obligation to provide Tom with the best defense possible, even if it means facing backlash and hostility from the community.

Secondly, Atticus also takes on Tom’s case because he believes in the principles of justice and equality. Atticus is a strong advocate for justice and fairness, and he recognizes that the legal system is often biased against marginalized groups like Black people. By defending Tom, Atticus is standing up for what he believes is right and just, even if it means going against the majority of the community.

Finally, Atticus also decides to defend Tom because he wants to set an example for his children, Scout and Jem. Atticus is a loving and caring father, and he wants to teach his children the importance of standing up for what is right, even when it is difficult. By defending Tom, Atticus is showing his children the value of compassion, empathy, and standing up for those in need.

Overall, Atticus defends Tom out of a sense of duty, a belief in justice and equality, and a desire to set a good example for his children. His decision to take on Tom’s case serves as a major turning point in the story of “To Kill a Mockingbird,” and highlights the importance of fighting for justice and equality in the face of adversity.