The meaning of life

I started off in my teens asking 'what is it all about'.
I am not convinced by any of the major offerings.
We have a great number of philosophically unbounded people; a majority that are now either disconnected from any continuous philosophy or not tied to a firm disciplined belief in the way that people were many years ago.
In short no one really believes anything.
The rights or wrongs of this trend is an issue but its not my issue.
As Bob Dylan said 'if you really believe that, you know you got nothing to win and nothing to lose.'
My question is : why is anybody doing anything?
What motivates people without beliefs?
I'll let you think about that for a while.