Unmet expectations. Somewhere written into a human's genetic code lie the instruction that when a person isn't happy, he or she is supposed to force his/her significant to make the changes required to make the unhappy person happy again. This usually takes the form of complaining, blaming, criticizing, nagging, threatening, punishing and/or bribing.
Finances. It's not usually the lack of finances that causes the divorce, but the lack of compatibility in the financial arena.
Opposites can attract but when two people are opposites in the financial department, divorce often ensues. Imagine the conflict if one is a saver and one is a spender. One is focused on the future while the other believes in living for today. One has no problem buying on credit, while the other believes in saving up for what one wants.
Over time, this conflict can reach such heights that divorce seems to be the only logical conclusion.
