The short answer
When sales and marketing chase different goals, they compete instead of build. The fix is one shared scoreboard — same target, same definition of a win. Once both teams are measured the same way, they stop protecting turf and start feeding each other.
Sales and marketing fight most when they're rewarded for different things. Marketing celebrates leads; sales celebrates closes. Research on alignment consistently shows that the gap between the two teams isn't personal — it's structural. When the goals are set separately, the work runs separately too. You're doing the hard thing: building a bridge between two groups who have historically had every reason to point fingers.
Marcus Aurelius puts it plainly — hold your purpose free from compulsion. That means the shared goal has to be genuinely shared, not handed down from above as a mandate. When both teams choose the same target together, they own it. They stop asking 'did we hit our number?' and start asking 'did we hit ours?'
This week, get both teams in the same room for one hour. Pick a single number — not a marketing number, not a sales number — that both sides agree means 'we won.' Write it on the wall. Then ask each team to name one thing the other side needs from them to hit it. That conversation alone will surface more friction than any audit.