What is the Greatest Evil on this Planet?

Determining the greatest evil on this planet is a complex and subjective matter, as people have different perspectives and priorities. However, in general, the greatest evil could be seen as a systemic problem or behavior that causes widespread harm and suffering, undermines human dignity, and threatens the future of life on Earth. Examples could include oppression, discrimination, poverty, war, environmental destruction, and inequality. Ultimately, the greatest evil may be the collective failure of humanity to address these issues and work towards a more just, equitable, and sustainable world.