Definitions

The American Humanist Association
Humanism is a progressive philosophy of life that, without theism and other supernatural beliefs, affirms our ability and responsibility to lead ethical lives of personal fulfillment that aspire to the greater good of humanity.
The Council for Secular Humanism
Secular humanism is a comprehensive, nonreligious life stance incorporating

  • A naturalistic philosophy
  • A cosmic outlook rooted in science
  • A consequentialist ethical system
The Humanist Society
Those who are attracted to a positive, progressive philosophy, unencumbered by the rigidity of traditional religions, embrace the vibrant life stance of humanism, the radical idea that you can be good without a god.

History

Humanist Manifesto I
Humanist Manifesto II
Humanism and Its Aspirations: Humanist Manifesto III
Resolution Affirming Human Rights for All
Humanist Manifesto 2000: A Call for a New Planetary Humanism

Resources

Affirmations of Humanism
The Philosophy of Humanism by Corliss Lamont (full text pdf)
Humanism in Literature: Ten Authors to Read
The Humanist.com (hub for news, politics, science, and culture from a humanist perspective)
AHA Center for Education (includes Introduction to Humanism free online courses)
Introducing Humanism: Non-religious Approaches to Life – FutureLearn (free online course developed by Humanists UK)
Free Inquiry magazine