In Chinese philosophy, yin and yang (陰陽 yīnyáng, literally "dark-bright", "negative-positive") describe how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent in the natural world, and how they may give rise to each other as they interrelate to one another. Many tangible dualities (such as light and dark, fire and water, expanding and contracting, left and right, black and white) are thought of as physical manifestations of the duality symbolized by yin and yang.
Duality is found in many belief systems, but yin and yang are parts of a Oneness that is also equated with the Tao. The term 'dualistic-monism' or dialectical monism has been coined in an attempt to express this fruitful paradox of simultaneous unity/duality. Yin and yang can be thought of as complementary (rather than opposing) forces that interact to form a dynamic system in which the whole is greater than the assembled parts (Gestalt). Everything has both yin and yang aspects (for instance, shadow cannot exist without light). Either of the two major aspects may manifest more strongly in a particular object, depending on the criterion of the observation. The yin yang (i.e. taijitu symbol) shows a balance between two opposites with a portion of the opposite element in middle of each.
Let’s consider masculinity and femininity in terms of Yin and Yang.
Masculinity (manhood or manliness) is a set of attributes, behaviors, and roles associated with boys and men. Traits traditionally viewed as masculine in Western society include courage, independence, assertiveness and aggression. Masculine norms, as described in Ronald F. Levant's Masculinity Reconstructed, are "avoidance of femininity; restricted emotions; pursuit of achievement and status; self-reliance; strength and aggression; homophobia.
Femininity (womanliness or womanhood) is a set of attributes, behaviors, and roles generally associated with girls and women. Traits traditionally cited as feminine include gentleness, empathy, and sensitivity. While the defining characteristics of femininity are not universally identical, some patterns exist: gentleness, empathy, sensitivity, caring, sweetness, compassion, tolerance, nurturance, deference, and succorance are traits that have traditionally been cited as feminine.
Let’s read a pertinent quote from Junger (mentioned in Chapter 14) in Tribe, On Homecoming and Belonging, page 126:
The most alarming rhetoric comes out of the dispute between liberals and conservatives, it’s a dangerous waste of time because they’re both right. The perennial conservative concern about high taxes supporting a nonworking “underclass” has entirely legitimate roots in our evolutionary past and shouldn’t be dismissed out of hand. Early hominids lived a precarious existence where freeloaders were a direct threat to survival, and so they developed an exceedingly acute sense of whether they were being taken advantage of by members of their own group. But by the same token, one of the hallmarks of early human society was the emergence of a culture of compassion that cared for the ill, the elderly, the wounded, and the unlucky. In today’s terms, that is a common liberal concern that also has to be taken into account. Those two driving forces have coexisted for hundreds of thousands of years in human society and have been duly codified in this country as a two-party political system. The eternal argument over so-called entitlement programs—and, more broadly, over liberal and conservative thought—will never be resolved because each side represents an ancient and absolutely essential component of our evolutionary past.
As Junger so succinctly implies, conservatives and particularly the alt-Right are the masculine Yin and the liberals particularly alt-Left are the feminine Yang. In the past 4 million years of Paleolithic human evolution, these two traits were working together in harmony and were invaluable to the survival of the species, otherwise our species could very well have gone extinct. Yin and Yang were evolutionarily selected and a product of human evolution. But now Yin and Yang seem to be separated and working against each other, as seen in the upside-down curve: