"In the world today, there's plenty of technology, plenty of entrepreneurs, plenty of money, plenty of venture capital. What's in short supply is great teams. Your biggest challenge will be building a great team. There's enormous change underway in every facet of the world. Some is technology driven, some is market driven. All that change creates unprecedented opportunity. But to take full advantage of those opportunities, focus on the team. Teams win."<p>I'll refer future askers of "Do I need a co-founder" to that. They can get what they will from that.<p>I've been reading Jessica Livingston's Founders at Work and these interviews have pretty much reaffirmed that statement from Doerr. The perseverance and the great team relationships involved are what made some of these early startups. Without that, sometimes you're just a guy with a great idea.