One of the principal themes presented in The Brothers Karamazov is the theme of “fathers and children.” Why does Dostoevsky put the tragedy of one family at the center of the novel?

One of the principal themes presented in The Brothers Karamazov is the theme of “fathers and children.” Why does Dostoevsky put the tragedy of one family at the center of the novel? What does “parricide” represent (think symbolically here)? Whose guilt is it? Fathers’? Children’s? Why? Is there a way out of this abnormal state of things, according to Dostoevsky? (300 words).