If a problem is fixable, if a situation is such that you can do something about it, then there is no need to worry. If it's not fixable, then there is no help in worrying. There is no benefit in worrying whatsoever.
Ethics: The indispensable interface between my desire to be happy and yours.
Disagreement is something normal.
What is the meaning of life? To be happy and useful.
If science proves some belief of Buddhism wrong, then Buddhism will have to change.
Just as compassion is the wish that all sentient beings be free of suffering, loving-kindness is the wish that all may enjoy happiness.