Keith has won the lottery and now has more money than he ever dreamed of having. this incident will likely affect keith's development and is an example of a:

This is an example of "Non-normative life event".

Non-normative life events refers to those events that happen surprisingly, for example, catastrophic events, loss of a relative and war or winning a lottery which is unexpected. Indeed, even in cases that passing or sickness, in particular ages, are factually viewed as regularizing, they are really non-regulating. They are as yet startling and undesired occasions, related with serious impacts. Non-normative events might be included both negative and positive occasions, for example, passing of a darling individual or winning in a lottery. Be that as it may, in the two cases, they are unexpected and slightly related to chronological age.