To what extent do good leaders shape his/her company and the people around them?

  “There are three rules for creating good leaders. Unfortunately, no one knows what they are.” W. Somerset Maugham

Leaders can make or break a government, a country, a family, a business or a sport. Meaning if the people or an organization chooses a good capable leader than the country, the business and the sports team will prosper. If they choose a dictator like Hitler or Mugabe then it leads to destruction of the country itself. 
That is why a lot of companies spend a lot of money and time searching for suitable CEO of the company. That is why it is important for the people of a country to go out and vote so that a proper suitable leader can be chosen for the country.
People generally want to be lead and to be good followers. When there is a charismatic, intelligent, honest, courageous, a visionary and successful leader they will follow.
The world's leading and successful nations have had great leaders at their helm. South Africa made a successful transaction from Apartheid to democracy because Nelson Mandela had the will and foresight to forgive the white regime that put him behind bars for 27 years.
Microsoft is the world's most successful company because of Bill Gates and his partners vision of a different way of using the computer and program writing. India has one of the most successful Indian Cricket teams ever because Mahindra Singh Dhoni is able to lead his team to victory time and time again due to his exceptional captaining ability and cricket skills. 
Leaders shape the people around them. The followers or team members carry out duties or live a good life by looking at the very good qualities a leader must have, namely the below. Today more than ever, we need great exceptional leaders. Without these leaders with foresight mankind will cease to exist as man kind is more bent on killing each other and the earth itself.