A Materialistic Philosophy of Life
Premise 1: Humans are entirely biological beings, the result of blind and aimless evolution on a random planet with favorable conditions for life.
Premise 2: A thinker being with no emotions (except for the awareness of its own existence), would have no objection to annihilation.
Premise 3: Humans are self-aware beings who also possess a range of emotions.
Conclusion 1: The only factor that makes human life worthwhile is emotions.
Premise 4: Human emotions can be generally reduced to suffering and Pleasure. Fear, sadness, anger, jealousy, anxiety, and depression make a person suffer. On the other hand, joy, gratitude, interest, hope, pride, amusement, inspiration, awe, and love contribute to feelings of pleasure.
Conclusion 2: The only factor that makes human life worthwhile is suffering and pleasure.
Premise 5: Humans are inherently selfish beings, prioritizing their own emotions over those of others.
Premise 6: Humans are also inherently altruistic, at least in the sense that they suffer from the suffering of certain others, like their family and friends.
Final Conclusion: The philosophy of human life is to reduce suffering and increase pleasure, first for oneself and then for others.