You know, you're right! My husband came from a large extended family, and for the most part they all lived within 20 miles of each other. When I first started dating him, it was a normal thing for me to be taken along to a Sunday get together, which could be as many as 60 people in someone's kitchen. As the older members died off, the get togethers died off.
On my side of the family, I can honestly say there was never a family reunion, a get together, and seldom a visit to relatives for the holidays. Granted, even back then, there weren't a lot of relatives. Just my immediate family, my aunt's family and my very elderly grandmother. Once grandma passed away, we never seemed to gather again. (not that it was fun anyway, my mom didn't like my dad's family, and even dad didn't care for them.)
But, now that I think about it, my children have really never met anyone in their dad's family. They are introduced at various funerals, and that's the only time they see them at all. Even my husband calls them "the funeral relatives."
That could be a VERY good reason my kids don't care about their history. It's nothing more than a bunch of strangers on a piece of paper.
Patty