Humanists believe that humans should work together and take care of each other, and shouldn't try to exploit each other for personal enrichment.
The Council for Secular Humanism
The Council for Secular Humanism explains that this worldview "centers upon human concerns and employs rational and scientific methods," is "dedicated to the fulfillment of the individual and humankind in general," and promotes "the development of tolerance and compassion as well as an understanding of the methods of science, critical analysis, and philosophical reflection." 
Humanist morality recognizes that the decisive factor in making an Ethical decision must be its predicted effect on the good of humanity, and they identify humans as the only source of support and salvation for the human race. Although humanism has a strong element of Atheism within it and realizes the necessity for separation of church and state, it should be noted that it is non-religious rather than anti-religious.
Religious humanism is similar to secular humanism and differs primarily in the characterization of its role as a substitute for religion, including fulfilling personal and social needs. The Humanist Manifesto of 1933, which is associated mainly with religious humanism, avows the rejection of doctrine, affirms that the goal of religion is to improve societal health, and acknowledges that all human experience is religious. 
Secular societies do well
Are the values that Bronze Age herders and Iron Age farmers wrote in the Bible really the best way to run a modern society? The links below suggests that nations based on secular values do better than more religious societies.
- Societies worse off 'when they have God on their side' Source: The Times (UK), 27 Sept 2005, by Ruth Gledhill
- Does a society need to have religion as the basis for morality?
- Religious belief can cause damage to a society
Adapted from Liberapedia