Many of today's health and behavioral problems are caused by the "mismatch hypothesis." Our brains evolved for a world of scarcity and danger, which is maladaptive in our current environment of abundance and relative safety, leading to issues like obesity and anxiety.
The "opposites attract" adage is misleading for long-term partnership. While different hobbies can create short-term sparks, sustained relationships thrive on shared fundamental principles. Alignment on core beliefs, not surface-level tastes, is the key predictor of marital success.
The two decisions with the most significant impact on your happiness are your choice of spouse and profession. These daily realities—who you wake up next to and what you spend your day doing—either provide constant joy or constant misery, eclipsing most other factors.
The path to professional happiness is not just about passion, but about the structure of the work. It requires two key elements: temporal freedom (autonomy over your schedule to avoid "scheduling asphyxia") and the opportunity to instantiate a creative impulse (building something new from scratch).
According to the "Darwinian niche partitioning hypothesis," younger siblings are often more rebellious and creative as they must differentiate themselves to gain parental investment. With established roles taken by older siblings, they are forced to explore unconventional niches, fostering out-of-the-box thinking.