Selfish??

I think there are several factors why people became selfish.First, because they make the choice to be selfish and as you act on your decision,the feelings will come. Second,they take for granted the joy of giving,not only will an unselfish act bring joy to others, but the giver will receive joy as well.Third,they have unrenewed thinking,we need to put selfless thoughts in and out.Lastly, i think they are unthankful, why? because people who are unthankful didnt recognize the goodness of others,therefore, they develop an unwillingness to give.