What is the theme in Swamp Thing by Alan Moore?

The nature of humanity is a theme in this story. Writer Alan Moore is credited with breathing new life into Swamp Thing in part by rethinking the hero's backstory and altering his very nature. In the past, Swamp Thing was considered to be a monstrous version of botanist Alec Holland. Holland's lab was blown up with Holland inside. A burning Holland flung himself into the swamp, where it was assumed the man's bio-restorative formula he was working on regenerated him, combining him with swamp vegetation to emerge as S