Theistic religions tend to convince people there exists a supernatural caretaker: one who listens to, considers, and sometimes responds to psychically transmitted pleas for justice. The same religions also tend to posit an eternally persisting supernatural realm accessible after death wherein this god will dish out punishments for sins and rewards for good deeds. But if there is no supernatural caretaker and no post-death justice, conscious beings concerned with the plight of other conscious beings must take the initiative to promote justice, equality, fairness, empathy, compassion, and understanding in the here-and-now. From a psychological standpoint, an increased desire for social justice in the here-and-now can be credited to the conclusion of atheism for some people. Atheism Plus honors that connection.
-from the Atheism Plus website