Who is really a hero?

In the old times, heroes were associated with those making adventures especial in wars or battle field. These days, however, heroes are those who win in the battle of generating brilliant ideas that are real, significant and bring about a better world. But is generating brilliant ideas enough to name one as hero? Many individuals have generated many brilliant ideas but those ideas lost without bringing a better life in our world. Obama was famous generating brilliant ideas and concepts but his ideas swallowed with routines. So, many would be heroes winning the battle of ideas have been lost for not putting their ideas on the ground. To me, a hero is one who generates brilliant ideas that would bring about a better world and achieve it in practice in real life situations. This requires both intellectual and emotional capability that breaks the ‘trader-prisoner’ dilemma!