Before there was punk there was pop, but utilizing pop sensibilities in punk music?
The Ramones and Buzzcocks immediately come to mind, but let's agree that there's no real starting point and those bands most likely fed off of each other as much as acted as a catalyst for each other.
So, in short- this is arguably, and I love to argue about music so come at me, the first true pop punk record of all time.
Let's fight.