Lithuania became a full-fledged member of the European Union on 1 May 2004.
Lithuanian citizenship will automatically grant you access to all the incredible benefits of an EU Passport holder. You will be able to freely live, work, study, set up a business, or retire in any EU country of your choice. As an EU national you will have full access to Social security benefits including world-class healthcare which is free or highly subsidised in most EU countries.
Furthermore, children born to a person with dual Lithuanian citizenship will automatically get EU citizenship, as well as their children and their children. So this is an investment for generations.