The only alternative to working together is working against. When someone is working against you it is not always obvious. Things take a little longer to get done, but you're not sure why.
People forget to do things.
More often than not lack of cooperation shows up through lethargy, through not being bothered, through lack of interest. Others will not put themselves out for you. People don't cooperate because they're not with you. More than likely they're not with you because they don't think you're with them. He doesn't bother with me except when he wants something.