Libertarians' desire for an ungoverned society and the Democrats' acceptance of social immorality significantly makes that large gulf a pool.
Not "ungoverned", "self" governed. You are an adult. Act like it and you won't need a Nanny State coddling you from cradle to grave. You and only you are 100% responsible for your actions and only you should suffer the conseqeunces of your mistakes.
Dems, and lately the GOP, are hell bent on making sure they protect you from yourself by removing choice, buffering you against your mistakes, and spreading the misery you create to as many around you as possible.
No thanks.