Depends on your definition of all, successful, and lucky.

If you change successful to be defined as people like OP, I believe a large majority of successful people are extremely lucky. Probably over 99.9%. They owe their success to being extremely fortunate in a combination of many factors, not limited to:

- Where they were born

- Who their parents were

- What food their parents gave them when they were kids

- What other types of nurture they received

- Where they went to school

- When they went to school

- Who they met at school

- Who their parents knew

- The time they were born

- The time they ...

You can go on and on here ...

seems like a not useful definition. If we go with this what is not from luck? Someone works hard? That's because they got lucky with the right genes and upbringing. They're smart, born to the right parents. If we go with this then everything in life is a matter of luck.

They can work hard, but it is really rare, extremely rare, that someone who was born to unfortunate circumstances will be very successful.