Shanmugalingam did not initially intend to become a dramatist or a theatrical performer, but befriended popular Indian theatre actor
Cho Ramasamy while in India. Upon his return to Sri Lanka he rejoined the Thirunelvely Young Men's Hindu Association. Soon after the conclusion of a
bharathanatyam event at the YMHA, he decided to get the attention of Kalai-Arasu Sornalingam, who was regarded as one of the stalwarts of Tamil theatre, and recited the lines from the popular Indian play
Raja Raja Cholan as if he were practicing them. Shanmugalingam became a playwright in part because one of the foremost
Tamil writers of that time, Sitpi Saravanapavan, was unable to provide their acting troupe with scripts because of his hectic schedule. His drama
Heaven with Hell also speaks volumes about him being a canny operator in Tamil theatre history. The play was released in book form and it depicted the aspects of important topics such as migration and social mobility within Tamil society while also combining philosophical aspects such as detachment and attachment. The book
Heaven with Hell was translated into English by S. Pathmanathan and it was launched in February 2022 in Jaffna. ==Death==