Big business has come out in favor of same-sex marriage. Exactly 379 corporations and employer organizations urged the Supreme Court to strike down state bans on gay marriage, according to a friend-of-the-court brief obtained by The Huffington Post. The document was expected to be filed late Thursday morning. “Employers are better served by a uniform marriage rule that gives equal dignity to employee relationships,” reads the brief, filed by global law firm Morgan Lewis. “Allowing same-sex couples to marry improves employee morale and productivity, reduces uncertainty, and removes the wasteful administrative burdens imposed by the current disparity of state law...