How does the author define the word "tribalism" in the text?

Quinn argues that the need for agriculture and modern civilization is egregiously overvalued. This view is in line with the “new tribalist” movement that Quinn birthed. The new tribalists use the term "tribalism" not in its widely-used derogatory sense, but to refer to what they see as the defining characteristics of tribal life: an open, egalitarian, classless and cooperative community. For Ishmael, facilitating such a world requires us to first recognize that life before civilization was not a constant struggle for survival, but rather a harmonious co-dependence between all life. Quinn essentially calls into question the idea that modern civilization is the best and only way to live.