He is currently working for the United Nations in Geneva. For him, the most significant deterrent when deciding whether to enter into a relationship is the likely transient nature of the rest of his life. Such is the character of the modern, international professional, at least throughout his or her 20s. Spare time, goods and relationships, these are all willingly traded for the exigencies of work. Nothing is valued so highly as accumulated experience.
Nothing is neglected so much as commitment.
She moved to the UK, specifically, to be with a man, a decision that she says few of her contemporaries understood. Today, you're meant to do things for yourself. For many, it is a trap that is difficult to break out of, not least because they are so caught up in a culture of professional development. And spoilt for choice, some like the American Rhodes Scholar no doubt become paralysed by their opportunities, unable to do much else in their lives, because they are so determined not to let a single one of their chances slip. If that means minimal personal commitments well into their 30s, so be it.