The EU "gives us strength in dealing with other centers of power in the world," including in trade negotiations, Sikorski said during the Freedom Games event in Poland's central city of Łódź on Friday.
Asked about Russia's war against Ukraine, the US position and Europe's role in resolving the conflict, Sikorski said Europe "has cards" to play.
He pointed to Europe's role in financing Ukraine, frozen Russian assets held in Europe, European funding for Ukraine's access to US weapons and technology, and Europe's own military and other support for Ukraine.
"The United States is literally no longer paying anything for this war, so its cards consist of selling us weapons, mainly ammunition for systems that Ukrainians received under Joe Biden, plus warnings about the launch of Russian cruise and ballistic missiles, plus the Starlink service, which we pay for," Sikorski said.
He said Europe should continue providing Ukraine with financial and military support for as long as it takes.
At the same time, Poland and other European countries should build up their defences based on lessons from the war in Ukraine, including the growing role of drones and drone systems and the ability of missiles and drones to strike "virtually any element of ground infrastructure."
"For Poland and Europe to remain secure in the coming years, we must not spoil the European Union," Sikorski said.
He also called for the development of European technologies for precision long-range strikes.
"It is very difficult to shoot down a ballistic missile traveling at five times the speed of sound. It is much easier to shoot down the aircraft from which it is launched, or strike the factory where it is produced," Sikorski said.
Asked about strengthening social resilience, Sikorski said Poland should ensure that "elections in Poland are decided by Poles, not by some foreign oligarchs."
He also warned against the influence of large amounts of private money on politics and called for European rules to apply to "the digital sphere as well as the physical world."
Asked about technological dependence on the United States and reports of restrictions on Ukraine's access to the Starlink satellite system, Sikorski said European companies were already working on a European alternative.
He criticized Starlink owner Elon Musk for becoming "involved in the politics of other countries," saying that "mixing politics and business usually ends badly."
"I wish Musk well, he is a great inventor, I hope he flies to Mars," Sikorski said.
Sikorski also compared Russian President Vladimir Putin's policies with those of former Soviet leader Leonid Brezhnev, saying Putin was spending too much on armaments and invading neighbouring countries and would sooner or later cause the Russian economy to collapse.
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Source: IAR/PAP