There is a lot of talk in evangelical circles about what the Gospel really is. This is an excellent article by Don Carson, published in the latest edition of Themelios, which makes it very clear. There are some who respond that he has made the Gospel too individualistic and not concerned enough with God’s Kingdom. But surely God saves people as individuals, THEN brings them together in the Kingdom. So I would agree with Carson that the corporate aspect is an entail of the Gospel.
Anyway, read the article here and see what you think.