Interesting that the most western linguistic groups - Italic and Celtic - form a cluster related to the most Eastern group (Tocharian).
One of the reasonable speculations about Proto-Indo-European is that, based on a lack of a common root word for large bodies of water (the ones used were either loanwords or made up when needed), the PIE speakers came from a place that didn’t have them, such as Central Asia (which is the most likely origin). :’)