If the poem is about going mad when love is lost, what would happen if love didn't die? identify the independent clause

An independent clause can stand on its own - it does not have to be supplemented with other elements of a sentence in order for it to exist, unlike with a dependent clause, which cannot exist on its own.
Here, the independent clause is What would happen if love didn't die?, whereas the dependent clause is if the poem is about going mad when love is lost.