Are there women that fight for this country the way so many men do?

Women don't think like men. They don't internalize honor, duty, or even justice. They have to have such values imposed upon them by men. Any women who think or behave like men are an unfortunate byproduct of Neo-Weimar.

Is it not their responsibility?

It shouldn't be, is the operative term.

Nature?

Correct; it's biology.

Men are the variables of human biology. Women are the control. Men vary far more widely on the scale of ability and intellect, while women represent a much tighter and smaller spread pattern. This is why there are many examples of male genius, but few examples of female genius. Feminism would have you believe this is because the female geniuses were “passed over” for being women and that they continue to be ignored to this day due to “systemic sexism.” This is not the case. Feminists invent unnamed and unremarked upon genius to cover up the fact that said genius never existed. “Systemic sexism,” conceptually, quite literally exists solely to plug a hole in the logical inconsistency of claiming that women are equal to men, while they still lack in ability and intelligence even today–after decades of rampant feminism and affirmative action prioritizing women at the expense of men. The claim of systemic “sexism” in Western society is an invented conspiracy. The purpose is to avoid having to address the fact that the public justifications for feminism and affirmative action did not pan out when executed in reality.

Men are possessed of greater heights of intelligence but are also cursed with deeper valleys of stupidity and incompetence. Women, by contrast, are deficient in genius outliers, but similarly are spared being direly stupid. In other words, men are very different from each other while most women are relatively the same. Men are the variables in the human experiment. Women are the controls. Because of natural selection, the most stupid men are weeded out over time. Only the strongest, most intelligent, and most cunning men had a chance to breed. This means that, over time, men have shifted further towards their upper outliers. Women have remained approximately static. In civilized society all women have a relatively decent chance of breeding and they are not selected for intelligence. It is likely that aeons ago, men and women were very similar intellectually and physically. Over time, men have become larger, stronger, and smarter, while women have not. Sexual dimorphism does not happen in a vacuum. It occurs for a reason. This is the reason for ours.

Because of sexual selection, men have advanced while women have not. That is the issue here. Men were selected, by women, overwhelmingly for positive traits. Women were hardly selected at all. Men have had to compete for women, with only the best traits surviving across generations–thus men became stronger, larger, and more intelligent. Women simply had to pick a man. Thus, modern man is quite different from ancient man in terms of size, intellect, overall health, and ability, while modern woman is functionally the same in mind, body, and instinct to primitive woman. This is why female sexual liberation is the death knell of every civilization that embraces it. This is hardly the first time it has occurred.