With the realization of ones own potential and self-confidence in ones ability, one can build a better world. According to my own experience, self-confidence is very important. That sort of confidence is not a blind one; it is an awareness of ones own potential. On that basis, human beings can transform themselves by increasing the good qualities and reducing the negative qualities.
To remain indifferent to the challenges we face is indefensible. If the goal is noble, whether or not it is realized within our lifetime is largely irrelevant. What we must do therefore is to strive and persevere and never give up.
If you want to change the world, first try to improve and bring about change within yourself. That will help change your family. From there it just gets bigger and bigger. Everything we do has some effect, some impact.