With rising incomes, the share of expenditures for food products declines. The resulting shift in expenditures affects demand patterns and employment structures.
Music and politics are in essence about communication. Without over-stretching the analogy I do feel a sense of rhythm is important in getting your message across.
Leadership consists not in degrees of technique but in traits of character; it requires moral rather than athletic or intellectual effort, and it imposes on both leader and follower alike the burdens of self-restraint.

