Introduction to Buddhism : Attaining Absolute Happiness

In facing extreme difficulties or disastrous situation, is happiness still achievable ? Life and death are so unpredictable, what's the meaning to be alive ? When seeing the intense sorrow of people around the globe, are we just immune from "their suffering" or is it also "our suffering" ? How can human being attain common victory as a whole ? Let's have an enlightened discussion of all this questions.