In an essay discussing social justice for UPSC, candidates can explore unique angles such as the impact of digital divide on marginalized communities or the intersectionality of class, gender, and race. Analyses of grassroots movements or historical injustices can lead to substantive discussions on current policies. Engaging with differing opinions on welfare programs or social reforms can also provide depth. Highlighting real-world case studies or innovative approaches to community engagement can further enrich the essay, demonstrating the candidate's critical thinking.