compatibility

Main Entry: com·pat·i·ble
Pronunciation: k&m-'pa-t&-b&l
Function: adjective
Etymology: Middle English, from Medieval Latin compatibilis, literally, sympathetic, from Late Latin compati
1 : capable of existing together in harmony

been thinking a lot about compatibility
how do people with different background live together
how come old people are so strongly against inter-race marriage
how come old people say that the rich and those from better off families should get married to people of that same category
what does it mean to be compatible?
be of the same standard?
same education background?
same financial background?
same religious background?
is it really that important to make a relationship work?
or will love be able to conquer it all?