Whitepaper #201 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional topics: fundamental space plasma theory; state of the profession; system science.
The undersampled mesoscale regime is crucial to study and we believe could be a unifying focus of heliospheric research in the coming decades. Making progress over the coming decades requires a new approach, enabled by advancements in measurement technology and computational power. We suggest 3 initiatives.