the article doesn't do a good job of explaining what happened to the socreds, though.
the bc wing actually became the bc liberal party, crazily enough - and it is the socred history that is the root cause of the bc liberals' right-ward slant. the alberta wing became the reform movement (ernest manning is preston manning's father). and the quebec wing, which was more focused on the monetary aspect, turned into the quasi-socialist bloc quebecois.
this is an important part of actual canadian history - not the canadian history that you imagine exists, but the one that actually happened in objective reality. and, it's not like they went away.
reform is a fundamental constant on the right. i don't know if it's tied to the history of protestantism or what, but it's always been there, and it will likely always be there.
the tories are the party of urban conservatives & old money. they're not the party of farmers, or of the rural poor. and, they've historically generally faced stiff resistance from populist movements in the countryside.
https://en.wikipedia.org/wiki/Social_Credit_Party_of_Canada