While Lynne McTaggart's latest will be very digestible for New Agers and self-proclaimed altruists, who will probably buy most copies, I think it should be taken seriously by those of us who have some pride in their scepticism, - even though it is endorsed by soft popularists who will provoke a 'not serious' response among harder nosed readers of popular science and sociology. The academic references I know about are solid, and the rest look pretty plausible.
The basic idea, that the whole system explains more than its elements, that we are inextricably linked - from sub-atomic particles, to individuals, to social groups, and therefore that our focus on individual identities and interests is warped, has been around for a while in some brands of mysticism, ancient philosophy and socialism (whatever the latter means - it's a word McTaggart wants to distance herself from). However McTaggart's marshalling of several hundred academic studies from physics, through biology and psychology to sociology and touches of politics and economics is an accomplished challenge to the western 'thingified' and isolated worldview which is losing utility.
The warm fuzzy conclusion, which I intellectually accept, is that we are happier, healthier and more fulfilled when we recognise our reflections in one another and act with loving altruism. But is there enough evidence to convince the naive social darwinist or game theorist who would define ultimate success as ethnically cleansing the rest of the universe and filling it with clones of oneself? Or more gently can you get the girl (or boy) without showing off or defamation?
Actually McTaggart cites theory and example from a Nobel prize winning schizophrenic to show that maybe you can. Collective co-operation, a bit like the elusive perfect market, can give everyone the best deal. It just takes more social sophistication. Making that implicit in most social interaction could be part of saving the world. And tracking the waves of interactions in most scenarios will teach us more about it. Towards that mindshift, 'The Bond' makes a good start; without it don't bet on getting (y)our selfish genes through the end of this century.