Buddha taught kindness towards lower beings; and since then there has not been a sect in India that has not taught charity to all beings, even to animals. This kindness, this mercy, this charity - greater than any doctrine - are what Buddhism left to us.
Here's an example: someone says, "Master, please hand me the knife," and he hands them the knife, blade first. "Please give me the other end," he says. And the master replies, "What would you do with the other end?" This is answering an everyday matter in terms of the metaphysical. When the question is, "Master, what is the fundamental principle of Buddhism?" Then he replies, "There is enough breeze in this fan to keep me cool." That is answering the metaphysical in terms of the everyday, and that is, more or less, the principle zen works on. The mundane and the sacred are one and the same.
There is a true feminist movement in Buddhism that relates to the goddess Tārā. Following her cultivation of bodhicitta, the bodhisattva's motivation, she looked upon the situation of those striving towards full awakening and she felt that there were too few people who attained Buddhahood as women. So she vowed, 'I have developed bodhicitta as a woman. For all my lifetimes along the path I vow to be born as a woman, and in my final lifetime when I attain Buddhahood, then, too, I will be a woman.'
Buddha was speaking about reality. Reality may be one, in its deepest essence, but Buddha also stated that all propositions about reality are only contingent. Reality is devoid of any intrinsic identity that can be captured by any one single proposition - that is what Buddha meant by "voidness." Therefore, Buddhism strongly discourages blind faith and fanaticism.
Solitude is happiness for one who is content, who has heard the Dhamma and clearly sees. Non-affliction is happiness in the world - harmlessness towards all living beings.
I think when religions such as Hinduism and Buddhism - as well as Christianity and Judaism - were founded, at that time societies were generally male-dominated. So, therefore this social notion also influenced religion.