Yes, children born out of wedlock run a greater risk of having problems in life, because statistically they have worse outcomes. Children born out of wedlock often have mothers who do not let the fathers be a part of the children's lives, or the fathers do not want to help the children.
Children born out of wedlock run a greater risk of problems in life, primarily because they usually grow up in a home with only one wage earner (or possibly no wage earners). Parental wealth and parental education levels are the primary determinants of a person's life outcomes, and both of those factors are associated negatively with births out of wedlock. A child born to two well-educated, wealthy, cohabitating parents who simply choose not to marry would not be at a significant disadvantage to a child of identical parents who were married. Unfortunately, most children born out of wedlock do not fall into that category.
Children born out of wedlock do not run a greater risk of having problems in life. Most single parent households run as efficiently as a two parent household. I think it all depends on where they live and how they are raised. With enough support from one parent they can go on to live healthy, average lives.
No, children born out of wedlock do not run a greater risk of having problems in life. As long as they are in a loving and stable environment they wouldn't have a greater risk then others. It is more important that they have love, security, and are taken care of.
I do not believe children born out of wedlock run a greater risk of having problems in life. Marriage is like a contract in today's world, it has lost its importance, especially with the onslaught of divorces. Marriage is created by man, its not a requirement of society. Some people may feel it is, but truly it is not.