In a sense.
I think it's a bit more complex than that. The altruistic instinct is also one of human nature (unless you're strictly restricting it), just as is the collective interest is often a rational self-interest.
And of course, humans are hardly rational self-interest maximizers. That notion also defies human nature.
This is the reason I wrote what I wrote like this:
Well, it's that everybody does most of what they do out of self-interest.
Of course human interest also contains an element for doing things solely out of kindness for others. But I think it's pretty obviously in the minority of the things we spend our time, energy, money, and other resources doing. Or, at least, it's a secondary priority.
And I don't think this is oversimplifying anything, either. I think we're just a bit uncomfortable admitting that Adam Smith was entirely right. But we shouldn't be. Admitting he was right doesn't turn us into a bunch of Howard Roarks. It's indisputably true that the primary reason people exert efforts, make sacrifices, and take risks in the name of producing value for others is not "benevolence" for those people...but to serve their own needs and wants.
This idea most certainly does not conflict with the idea that people are also, at their core, charitable. In fact, being prosperous enhances our ability to be better givers. So, really, they go hand in hand.
My Man Mitch, again:
Every day, we work to lower the costs and barriers to free men and women creating wealth for each other. We build roads, and bridges, and new sources of homegrown energy at record rates, in order to have the strongest possible backbone to which people of enterprise can attach their investments and build their dreams. When business leaders ask me what they can do for Indiana, I always reply: “Make money. Go make money. That’s the first act of ‘corporate citizenship.’ If you do that, you’ll have to hire someone else, and you’ll have enough profit to help one of those non-profits we’re so proud of.”
The more people in a society who subscribe to this general philosophy, the more prosperous that society will be.