The New Zealand flag debate is a periodic question over whether the national flag should be changed. For several decades, alternative designs have been proposed, with varying degrees of support. There is no consensus among proponents of changing the flag as to which design should replace the current one. Common criticisms of the existing form of the New Zealand flag are its similarity to the Australian flag and the inappropriateness of retaining the Union Jack in the design. A series of polls conducted since the 1970s have shown that a majority of New Zealanders prefer the current flag.