There are more than 500 million left-handed people on Earth with many notables from the past. A few:
Alexander the Great
Charlemagne-799 AD established our calendar
Queen Victoria
Winston Churchill, "Success is the ability to go from one failure to another with no loss of enthusiasm."
Benjamin Netanyahu

Left-handed Presidents:
44. Barack Obama "If you're walking down the right path and you're willing to keep walking you will make progress."
42. Bill Clinton
41. George H. W. Bush
38. Gerald Ford
35 Jack Kennedy
33.Harry S. Truman, "It is amazing what you can accomplish if you don't care who gets the credit."
20.James Garfield

I'm left-handed, too; )