I wouldn't say that. Albion's seed has sprouted on two continents in the form of four separate countries - the US, Canada, Australia and New Zealand. Added together, these territories are almost 50% larger than the Russian behemoth. For these countries, England will always be the Mother Country, and the Union Jack a welcome sight.
From a FReeper with a Chinese name, no less! We ("UK seed") have had our failings but (to use an old Gaelic video title) "The Seed is Strong."
Britain has had other successful plantings -- your typical Anglican for many decades has been an African woman: of the 77 million Anglicans worldwide, only a very few million are native English-speakers.
The British empire may be long since gone, but it has left many positive effects around the world. From what I have personally seen it has been a huge benefit to India -- the largest democracy (democratic republic?) in the world today.
Well said.