Expanding inter-regional transmission will be critical to meet our decarbonization targets. Numerous modelling studies have shown the benefits of transmission, though many have focused on costs and emissions alone. Using probabilistic approaches combined with power system modeling, we show that the reliability and resilience benefits of transmission expansion outweigh the emissions benefits. Transmission lines connect high-quality renewable resource areas to load centers, lowering the cost of generation. Interconnecting different parts of the power system makes the network more reliable and resilient. Larger transmission networks allow operators to balance power production and consumption between different parts of the country. The benefits of transmission are broadly acknowledged, but building transmission infrastructure proves difficult. Politics, governance, financing and permitting are significant barriers globally. The United States, Europe, Canada and Australia are each tackling these barriers in different ways. This presentation will compare the different approaches being taken to tackle inter-regional transmission, deduce the winning strategies, and highlight gaps in each region.