flores-et-dracones:

people who caused the Trojan War:
1) Aphrodite (for bribing Paris with Helen, without Helen’s consent or any regard for her wishes)
2) Paris (for accepting Aphrodite’s bribe, without any regard for Helen’s wishes)
3) Tyndareus and Odysseus (for making all Helen’s suitors swear an oath to take up arms against any man who ‘stole’ her)
4) Menelaus (for going to war with Troy to get Helen ‘and all her wealth’ back, without any regard for Helen’s wishes)

people who did not cause the Trojan War:
1) Helen