Yeh they’ve massively underachieved but a few factors I can think of mean it’s not exactly a fair comparison!
- Today, Edinburgh area realistically only half that of Greater Glasgow and has larger migrant population (often from other parts of the UK) who don’t have local roots (anyone who has worked in Edinburgh & Edinburgh will know what I mean - found the workplaces in both radically different, strong English influence in one Edinburgh office worked in!)
- A century or so ago as the footballing culture began to be set, Glasgow also used to have a far greater proportion of the Scottish population. No surprise then there’d be more teams in Glasgow which attracted bigger crowds. Then even tonnes of folk moving to new towns in the east to clear the city had roots in Glasgow.
- Football a more traditionally working class game so obviously with Glasgow having a bigger working class community it’d take hold stronger. Still think it’s a myth that rugby is the more popular sport but Edinburgh is more affluent and I found folk aren’t as passionate about their clubs - ie lots of fair weather Hibs/Hearts fans.
- Probably also a case of us and them doing well early and the support showballing from there across the country which would carry on for generations.
- Take the whole religious rivalry for those who support Rangers/Celtic outside the city. Bigger in every scale in Glasgow than Edinburgh which is seen as a smaller scale version. Obviously the bigger one is more attractive to indulge in.
Anyway, sorry for going on! Actually read Hearts had a great team in the 1910s who went to fight in WWI in McCrae’s Battalion. Had the war not happened, theory is they’d have become Edinburgh’s premier team by some distance and a force to be reckoned with on par with Rangers and Celtic. Instead they bravely fought and after the war so many deaths and injuries had occurred, then struggled to re-find form of before. Just bad luck and instead the two clubs (Hibs and Hearts) just looked at each other to give themselves purpose.