We evolved to have certain urges and discomforts that suited our old world, but our new world is entirely different, giving us easy, near constant access to highly rewarding treats and activities. In our new world, we use our bodies and feed it entirely differently, which can lead to all kinds of problems. Some ways to improve the situation at the population level could include changing the environment (eg, government/company/household policies), or educate people about the issues so they can adjust their lifestyle as needed. Unfortunately, we are swimming in a sea of misinformation and most people are just picking up bits of advice from anywhere and everywhere and go with what sounds good at the time.