The correct answer to this open question is the following.
Although there is no context, article, text, or further references, we can comment on the following general terms.
We are talking about English Professor John Hick (January 1922-2012), a philosopher and scholar who taught classes in some Ivy League schools in the United States and in Birmingham, England.
Hicks believed that it was God, the supreme being, the one that allowed pain and suffering in humans. The purpose? The constant learning and evolution of human souls through pain and suffering.
Although this concept could sound cruel, it was not for Hicks. Indeed, he considered that this was good because pain and suffering were lessons provided by God so humans could grow through experience. So evil things lived by humans forced them to endure the pain and learn a lesson in order to grow spiritually. For him, this was God's purpose.
And of course, I do not agree with his theory. I don't consider God as a God of Fear. No. My God is a God of Love, not of evil.
Evil and good are no God's issues. These are human issues. It is humans that do good things and bad things and can endure the consequences of their acts.