According to tourist guides & legend, & I have no idea whether this is true or not, Ireland & Britain was once joined together, through an isthmus known as the Giant’s Causeway , between Northern Ireland & Scotland. So if this was true in the past, tens of thousands of years ago, what if this isthmus remained until the current day? So what historical effect would a joined Britain & Ireland have on these two locations? And what effect would this have on both European & Global history in general? Discuss.