If each person with high capacity (and God created many in his own image; some say he created us all that way) were to do his or her best, in the light of a decent SWOT Analysis (Strengths, Weaknesses, Opportunities, and Threats) for self, family and society, in aggregate we could make a difference. How people choose to "invest" themselves and their resources is up to them. For some philanthropy is the right lever, for others social investing, or starting a business, or political organizing, or nonprofit leadership, or thought leadership, or leadership via music, theater or sermon. The better our "map" or social change theory, the better will be the SWOT. The more options people have to pick from the better.
We can all do a little bit more, at the limits of what is workable for us. If we keep our peripheral vision open we may see others doing a little more too, maybe in a way we would not have chosen. But in aggregate we may each be responding to the voice of something larger, calling us each to a higher purpose.
Imagine an orchestra with no sheet music and the conductor is invisible. The bass drum, clarinet, trumpet, and oboe may all be responding the the holy spirit, or a tradition, to something that raises their notes into a symphony.