The world hasn't really changed in essence..but yes people change, goals change, our expectations,wants and desires change. The more we learn the more we develop and either we can become better people or worse. But the one thing that's constant is change. And rather than fighting it all we should learn to accept and embrace many of life's changes even though it may not always be in our favor.
Perhaps its the effect of been from a war torn country and a tumultuous household, but even at five I was aware that whilst some people were very kind,dependable,good and even wonderful there were also those who were evil, moody and untrustworthy. Today I still feel the same somewhat only difference being that I also accept I myself possess a not so good side to my personality and certainly don't lack faults.