The most recent version of Ghost drops including JQuery itself; per http://dev.ghost.org/no-more-jquery/, they advise manually adding the resource if your theme uses it.
This is an extremely quick fix I did just to get my own blog up and running; a slightly better solution would be to conditionally load the script. It's possible you'd want more permanent, tested solution, but I figured it would still be at least mildly valuable to share my fix back since it doesn't seem like ghostium is updated a huge amount.
The most recent version of Ghost drops including JQuery itself; per http://dev.ghost.org/no-more-jquery/, they advise manually adding the resource if your theme uses it.
This is an extremely quick fix I did just to get my own blog up and running; a slightly better solution would be to conditionally load the script. It's possible you'd want more permanent, tested solution, but I figured it would still be at least mildly valuable to share my fix back since it doesn't seem like ghostium is updated a huge amount.