Depends on the state... others say 'Red' v. 'Blue' I'm not sure what that means since that has no legal standing in a family court. Red states like Florida, Alabama, Mississippi, and South Carolina are NOT community property states, and I know plenty of men that lived there get raked over the coals. California gets a bad rap for divorce, mostly because there are a lot of high-profile celebrity divorces that look really bad. But for the average man, divorce in California really isn't too bad since it is a community property state. Connecticut is really bad (Blue State) and Florida is really bad (Red State).
If you are in a community property state, then division of assets only applies to that which was attained during a marriage, so if you bring a lot into a marriage, you get to keep that... but be warned, anything you bring in needs to be kept separate. If you have an investment account while single, you will need to open a new investment account. Don't take your single investments and create and change them to joint... legally what you brought in is still yours, but now you have to prove in family court. DO NOT let your new partner talk you into selling a home you already own, and roll the equity into a new home you both jointly own. Because then that equity becomes a joint asset.
Pre-nups will get tossed out by family court judges if the pre-nup does not have clearly defined limits. You cannot just say "no-alimony" as an open-ended statement because the judge will rule it "unconscionable" as
@Free_Agent stated. For a no-alimony clause in a pre-nup to be considered reasonable, there have to be specific limits and conditions attached... Something like no-alimony unless the marriage lasts for more than 10 years, or if the spouse continues to work. The agreement MUST have clearly defined conditions with time limits... then you have to make sure that your spouse was not under 'duress' or was competent when she signed. Having witnesses is important. I would recommend that if you need a pre-nup, hire a lawyer that specialized in family court, and if you move to a new state, insure the pre-nup is going to be enforceable in your new jurisdiction.... it's always a good idea to revisit the pre-nup periodically, because something signed 20 years ago in another state can and will be tossed out by judges.