The group formed in late 2000 out of the southern Adelaide surf/hardcore scene, and cite influences ranging from Fugazi, Boysetsfire, At the Drive-in, Cave In, and The Cure.

"[5] From Catalan, the single "Gracefully" was released on 7" vinyl, and was produced as a film clip which received television play on Channel V, ABC's Rage, and JTV.

Taking all the best bits from the likes of Sunny Day Real Estate, Texas Is The Reason and Elliott, then integrating them into their own Oz punk stylings, Mere Theory came out with a rock album of international standard.

"[citation needed] 2007 saw Mere Theory set out on a national tour in support of their debut album Catalan Atlas, sharing the stage with numerous Australian acts, highlighted with good friends Blueline Medic, as well as Calling All Cars.

Recorded by Evan James (The Mark of Cain, Pharaohs), mixed by Richard Stolz (Bodyjar, After the Fall), Walking in Storms was released through MGM in 2011.

[citation needed] Mere Theory toured from 2002 to 2012, playing hundreds of shows across Australia, sharing the stage with international contemporaries Millencolin, Alexisonfire, Rufio, Unwritten Law, MXPX, Anberlin, The Juliana Theory, Off Minor, Bouncing Souls, Midtown, Useless ID, Dropkick Murphys, Your Black Star, and Australian acts including Gyroscope, After the Fall, Karnivool, Frenzal Rhomb, Shihad, Bodyjar, Grinspoon, The Butterfly Effect, COG, Kisschasy, The Hot Lies, One Dollar Short, Blueline Medic, 28 Days, Antiskeptic, I Killed the Prom Queen, The Nation Blue, Trial Kennedy, The Bearded Clams, 99 Reasons Why, Thinktank, Seraphs Coal, Embodiment 12:14, Paper Arms, Grenadiers, Floating Me and Horsell Common.