Why being Anglican matters | The grumpy bishop | Blogs 
Nobody invented Anglicanism. It is the result of over 1500 years of ups and downs, challenges, opportunities and disasters. It is and continues today to be highly contested; especially now that Anglicanism is free from the Royal Supremacy of the Church of England and finds itself existing in diverse cultures and circumstances around the world. And now the Anglican Communion, (a kind of ecclesiastical version of the Commonwealth of Nations) is facing irrevocable change with the loosening of ties and divisions that are going to last, sadly.
All is not lost. There is a heart to Anglicanism even if there is fuzziness at the edges. Its identity is found firstly by being a church of Jesus Christ. Only by being his will we know who we are. And then there are historic characteristics that still work for us; the place of Scripture for all things necessary for salvation and freedom in adaption of church customs as expounded by Cranmer and then Hooker. As well as that, a message for the world of God's love for the unworthy.
In fact, surprisingly you can't go much past the Fundamental Declarations of the 1961 Constitution of the Anglican Church of Australia for a good centre for Anglican identity. All three of them.