No idea about introduction, topic is a little bit dark for me. So, I begin immediately.

Changing people is difficult, this fact is incontestable. Character includes many traits, and remove one or all of them seems quite impossible. In modern community it's customary to respect individualiry of every person, take into account special aspects of temper. And this fact sounds funny for me. So, it means, that you can do everything you want, and nobody can remark on your behavior: that's just a kind of character, get over it. Rubbish! If you conduct yourself like a rude fellow, you have to not only think about everyone's politeness. If  you don't play any role in social life, don't cry and complain. Work at your own personality, become stronger.

Some people think, that changing human nnature is much harder, that to change rivers and mountains. Of course. Theoretically, we don't make every effor for drill stone or stop a stream, with modern technologies it's easy. But there is a big difference between these changes. Human can do with his character quite everythig he wants. Yes, it takes much time, but temper is alterable. 

In contrast to nature. You can't fix a mountain, fill again a river, grow a forest in the shake of a hand. Nevertheless we still destroy it feel free, because it's easy. And who cares.

Of course character changing is time-consuming, hard and sometimes painful. But we can return it at any time. Nature is more variable. And irretrievable.

Sorry for confusion, mistakes and thank you for attention.