I dont think people are born criminals but I do think that some have certain personality traits that make them prone to go after an easy win rather than work for something, as they can't cope with delayed gratification. I did do a criminology course some years ago and worked with young offenders for a few years. It was a great insight. Many of the parents were nice genuine people but were clearly having rings run round them by their kids, even when as young as 8 or 9. Of course criminals come in all shapes and sizes so no one theory will fit all of them but I do think to an extent there is a bit of nature in this.