A person interested in caring for everyone needs to have a fairly objective understanding of humanity's needs. If you suddenly lose balance in any of these four areas, it would be like a leg of the table being pulled out, tipping the table over. In other words, your goals and dreams couldn't be fully realized with ill health, mental illness, no personal relationships, or corrupted personal ethics. If any of these life-support systems undergo imbalance through war, depression, toxic pollution, or community violence, our lives are threatened and goals and dreams may become impossible. Without some kind of transformation, self-centered people will block a chain reaction from ever happening.
Infants naturally start life being self-centered.
But it's also natural for them to grow up to be people who care actively for their family and friends. More mature adults go beyond this level of caring to care actively for certain groups of people. For instance, someone might be concerned enough about the homeless to volunteer at a shelter. Someone else might actively care about the rights of prisoners, or the hungry. Beyond this, and very rare, are the people who care for all.