Which book? That sounds an awful lot like Brains & Careers.
I have desires to make an impact on varying levels.
On a smaller scale I want to make a good impression, to be loveable and come off as smart, witty, sophisticated to a degree, creative and be popular. Like last night when I walked the catwalk for a benefit fashion show and got really good reactions (especially during the practice run in front of the girls), I felt fulfilled in a sense.
But there's a greater sense in which if I did not fulfill it, I would not feel complete. A sense in which I think everyone wants to make a profound impact, no less the SP, regardless of our supposed penchant for simply desiring a good image or something within the various moment one finds oneself in.
I guess the best example I can come up with is Robin Hood. There's no doubt in my mind that he was an SP - totally engrossed in the moment, fully aware of all his surroundings, clever, skilled with his tools (bow & arrow), witty and extremely tactical. Yet he put his life to a greater purpose, that of defending the poor and downtrodden and fighting an oppressive king.
The audacity of the SP to fight oppression is totally different than that of the NF's urge to reconcile or strengthen the bonds between people, or the NT's drive to make life more efficient and liveable for others, or the SJ's duty to defend against the invaders. Every temperament has its part and just because one seems more inclined in its weakness towards criminal activity means nothing in this regard.
So, I would not feel fulfilled if I were not doing my part to use the resources I can to fight whatever forces are hampering the freedom of others or oppressing them. That's ultimately the kind of impact I want to have.