From my textbook for Science Teaching Methods:
"Change came about as the result of disagreement, the marshaling of systematic evidence, sustained investigation (which involved some surveying of students, adults, and local gardeners), and even the help of outside experts. "
Isn't it cool that disagreement can be a catalyst for positive change?
We don't have to all hold the same opinion, we don't need to bash each other over the head when our ideas differ, and sometimes we don't even need to "agree to disagree," pretending there isn't an issue. We can use disagreements as a springboard for investigation, exploration, and learning, eventually coming to a consensus.
The idea gives me shivers (the happy kind).