John Adams believed all planets had life William Lawrence Sr Omnibit 3-27-18 No, Jimmy Carter was not first person to believe in ET. John Adams believed all planets had life on them. John Adams believed all planets had life William Lawrence Sr Omnibit 3-27-18 Share this:PrintFacebookTwitterTelegramMeWeWhatsAppPinterestLinkedInParlerGabRedditEmailMorePocketTumblrLike this:Like Loading... Related