Disagree! How you're brought up can affect your life chances. The more advantages you have as a child, the more likely you are to 'succeed' in life, although 'succeed' will inevitably mean different things to different people. Better education = better job prospects = better chance to accumulate wealth.
Of course there are plenty of examples of people from poorer backgrounds doing well in life, but I would suggest they are anomalies and generally the privileged do better overall.
Reminds of a guy I was talking to many years ago whilst in New York. He said he was sick of ghetto people moaning about their lot, and that if they didn't like their current life they should get on a bus, move out to a better neighbourhood and get a decent job. He held the view that everyone was in control of their destiny, but was unable to explain in practical terms how these improvements could be achieved. It's stuck with me ever since.