Every developed economy in the world developed by following protectionist economic policies. Until today, the US is ranked as one of the most protectionist economies in the world.
The policy for any national economy should not automatically be integration into the global economy because the entities that dominate the global economy dwarf any domestic competition.
The goal for any national economy should not automatically be growth and increasing GDP, but establishing self-reliance and sustainability. That means production for domestic consumption, not production for export
There should be a minimal gap between rich and poor, livable wages, credit for genuine entrepreneurship (not franchising of global brands), manufacturing for domestic industry and the domestic market, not manufacturing to decrease labor costs of multinationals to sell globally.
That is how you build a strong economy, that is how any strong economy was ever built