The facts of determinism - that external factors that form our development, such as experiences, and internal factors such as biochemistry, predestine us to our fates - are noted as mentioned by neurologists, physicists and philosophers. Above these, these facts are proclaimed also by none other than Albert Einstein:
“I do not at all believe in human freedom in the philosophical sense. Everybody acts not only under external compulsion but also in accordance with inner neccessity.”
- Albert Einstein (reference on www.humantruth.info/free_will.html)
I'm reading a collection of Einstein's writings called "Ideas and Opinions" and well chuffed to come across this two-line chestnut!
(Nothing feels better than reducing one of the world's greatest minds to little quotations!)