Entrepreneurship is all about making an impact...
Ravishankar Gundlapalli stashed this in Impact
Here is an article I wrote recently on this topic of 'Impact':
Recently, Jim Collins also spoke on this topic of companies becoming great by making an impact: http://www.inc.com/magazine/201206/bo-burlingham/jim-collins-exclusive-interview-be-great-now.html
Not every founder starts a company with impact in mind.
Vinod Khosla identified three other reasons to start a company: fame, money, and friendship. http://pandawhale.com/convo/298/3-reasons-to-start-a-company-fame-money-or-friendship-vkhosla-via-xconomy