According to this video from Jeffrey Kluger, last born kids have more ability to charm, disarm, intuit, funny, and dodge those punches from older siblings. They are all less often vaccinated as much as the older kids. I'm a last born kid, and I accept that I am ALL of those thing. I kid. But I often wonder what birth order had to do with who I am today. I am the shortest by the way in our family, as most younger kids typically are in a family.
He also mentions that the biggest trigger amongst siblings is property- kids are always fighting over toys and what is "fair." But that is a part of growing up. Learning what is fair, when to give up and when to hold your ground. Then again, older siblings have the same problems it seems.
The speaker notes to viewers to make the most of those bonds with siblings. His advice: If sibling relationships are broken and can be fixed, fix them. If you they work, make them better. Failing to do so, is like having 1000 acres of fertile farmland and letting it lie fallow.
