This describes my daughter very well. We wrapped up a RTW when she was 15. The following summer she got introduced to a friend of a friend who was running for Mayor of Vancouver as an independent candidate. (for local folks, Shauna Sylvester, who came 3rd).The kids came back astonishingly competent. The only issues they had re-adjusting to land-based school when they returned was that they were more worldly and immensely more self-sufficient than their nominal peers.
At age 16 she was the "Campaign Coordinator" - responsible for a whole heck of a bunch in a political campaign. We didn't see much of her that summer and into the fall. She said it was common for her to be talking to somebody (community organizer, all candidates meeting chair, important donors) who would look her up on Google and say "Wait a second. How old are you?" She would just reply "I'm 16, can we get back to the topic?"
At 17, on a school spring break from her high school in Swaziland, she and a friend hitchhiked across about 1000 km of the Kalahari desert when their bus was cancelled and alternate plans kept falling through.
She's 21 now and at university. She volunteers in probably Canada's most gritty and dangerous neighborhoods, Vancouver's Downtown East Side. Walking to her car after she was done, a rather drugged up local guy tried to get into her car, saying he was going to kidnap her. She told him off (on the other side of the car) and calmly walked away, back to the volunteer job location to let others know to take care.
She is quietly and scarily competent in traveling the world and dealing with all sorts of cultures. And she is kind, intelligent and I do think that her upbringing had a lot to do with it.
HOWEVER (to kind of get back to the topic on hand) she HATED Captain Cook.
"M. do you know who anchored here for the transit of Venus?"
"M. can you guess why this town was called '1770' ?"
"M. do you want to walk to the top of this island so we can see the Barrier Reef?"
All of these, and many more, were places Cook had visited. He got around.
Ms. Heywood's parents sound like fuckwits however.