Imprisoning political prisoners is a great kick off to a bright future (historically speaking).
Lots of things to criticize Sarkozy for but his support for the intervention is not one of them.
Yes, because removing Gaddafi from power after he yielded to international pressure to give up his nuclear-weapons ambitions makes it less likely that leaders will agree to give up nuclear ambitions in the future.
All leaders of countries know that no one would do to the leader of North Korea what France, Britain and the US did to Gaddafi -- because North Korea has nukes.