Human problems belong to human beings. We have created our own problems, but resist any actions to correct human problems. If I gave a list of solutions we'd be here for 1000 years or more. Existentialism does not play a role.
It does no such thing ! You may want to read about philosophy to learn what existentialism is.
We are pretty sure it exists.
Humans have values, secularly as well as religious. Religion need not play a part in human values. Existentialism is moot.
By trying to bring people out of the dark ages, to be educated with scientific facts of how we got here, and not rely on some sky-fairy, but rather ourselves. The use of the word existentialism with atheiest is unnecessary.
To my knowledge atheism is not philosophocal, therefore existentialism, which means existence, is moot. We do believe that humans, religious or non, have problems. I don't really assume they exist, but research through independant studies conclude humans have problems, minor and major.
Philosophers like Jean-Paul Sartre and Friedrich Nietzsche offer very different takes on the idea of existentialism. Ultimately, the different types of existentialism rest on the unified idea of examining human existence.
Atheists will agree that humans exist and my opinion that human purpose is to live, learn, teach, enjoy life as we only get one shot, and to try to leave the world better off than when we came into it.
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Some disadvantages of existentialism include its focus on individual experience, which can lead to a sense of isolation and alienation from others. Additionally, existentialism's emphasis on personal responsibility and freedom may be overwhelming for some individuals, as it requires making difficult choices without clear guidelines or solutions. Existentialism can also be criticized for its tendency to potentially disregard social and historical contexts that shape human existence.
Naturalistic Secular Humanism asserts that human ethics and morals are derived from reason, nature, and shared human experience without the need for supernatural beliefs. Atheistic existentialism focuses on individual freedom, subjective experience, and the responsibility to create one's own meaning and values in the absence of a higher power. All these philosophies emphasize the importance of reason, critical thinking, and human agency in navigating life's challenges and finding purpose.
It can provide solutions to social problems.