What makes 2 + 2 = 5 by Radiohead notable?

The title track, '2 + 2 = 5', gained significant attention for its politically charged lyrics and sharp critique of societal norms, reflecting the climate of discontent leading up to the Iraq War. It received critical acclaim and solidified Radiohead's influence on the alternative rock landscape during the early 2000s. In 2003, Radiohead was transitioning from their commercially successful 'Hail to the Thief' while embracing a more avant-garde approach. This album marked a period of artistic exploration post-breakthrough success, showcasing their willingness to challenge conventional songwriting.