I mean, everything in life requires cooperation, but that’s not the point. Rice took twice as many labor hours as wheat and required more irrigation. According to Shenshi Nongshu, “if one is short of labor, it is best to grow wheat”. Also studies have shown that in China people in historically rice farming areas behave more collectively than those in wheat regions. Not all grasses behave the same way and need the same things, especially with how much we’ve bred them to our needs.