Until a few weeks ago, Europeans believed they lived in a kind of sanctuary, insulated from the world’s current conflicts. Certainly, the news and images of drowned migrants were dreadful; but the tragedy occurring south of Italy, Greece, and Malta, seemed a long way off.

Syria’s brutal civil war, which has been raging for years, seemed even farther away. Syrian President Bashar al-Assad deployed poison gas and later barrel bombs filled with nails and metal fragments against his rebellious population. And those who escaped Assad’s henchmen found themselves confronted by the terror of the Islamic State. Hundreds of thousands were killed, and millions of Syrians have fled, with most living in camps in Jordan, Lebanon, or Turkey for years, in appalling conditions and with no hope of improvement.

So, sometime this summer, when the last glimmer of hope of a return to Syria disappeared and an alternative to Assad and the Islamic State no longer seemed realistic, these people started heading toward Europe, which seemed to promise a future of peace, freedom, and security. The refugees came via Turkey, Greece, and the Balkan states, or across the Mediterranean to escape similar chaos in Eritrea, Libya, Somalia, and Sudan.

In August, thousands of refugees became stranded at Budapest’s Keleti train station for days on end when Hungary’s vexed and incompetent government deliberately allowed the situation to escalate. Eventually, thousands of men, women, and children – and even old and disabled people – started to make their way on foot toward the Austrian border. At this point Europe, witnessing an exodus of biblical proportions, could no longer ignore the challenge and the consequences of the crises in its neighboring region. Europe was now directly confronted with the harsh realities from which it had appeared to be a sanctuary.

Europe was, no surprise, unprepared. The European Union lacked the civilian, diplomatic, and military tools needed to contain, let alone resolve, the crises and conflicts in its neighborhood. And, once the migrants headed for Europe, the EU’s common asylum policy failed, because the so-called Dublin III agreement provided no effective mechanism to distribute asylum-seekers among all members states after their initial registration in EU border states (in particular Greece and Italy). Italian Prime Minister MatteoRenzi’s call for European solidarity went unheeded.

When thousands of refugees arrived in Budapest on their way to Germany and Scandinavia, a humanitarian disaster loomed, and German Chancellor Angela Merkel had to choose: either take in the refugees or risk further escalation of the crisis in Budapest. Germany probably could not have stood idly by even for another two days.

Merkel took the brave and correct decision to let the refugees enter Germany. For this, she deserves wholehearted respect and full support, all the more so in view of the icy response of many within her own party.

But Merkel was not alone in embodying humane values at this decisive moment. Civil-society groups in Germany, Austria, and elsewhere mobilized to a hitherto unseen extent to meet – together with the public authorities – the enormous challenge posed by the influx. Without the public’s active empathy, the authorities would never have managed. With the support of such ad hoc coalitions, Europe should do whatever it takes to ensure the refugees’ successful integration.

The influx launched during the "refugee summer” will change Germany and Europe. The EU will be able to address the challenge – and seize the opportunity – of integrating the newcomers only together and in the spirit of European solidarity. Should unity crumble in this crisis, the consequences for all parties involved – especially the refugees – will be grave.

First and foremost, a new, effective system for securing Europe’s external borders must be established as quickly as possible. This includes a joint procedure for judging asylum claims and a mechanism to distribute the refugees among EU countries fairly. Moreover, if the EU wants to maintain its core values, including the abolition of internal borders, it will need to focus on stabilizing its Middle Eastern, North African, and Eastern European neighbors with money, commitment, and all its hard and soft power. A united approach will be crucial.

But Europe should avoid the kind of dismal realpolitik that would betray its core values elsewhere. It would be a grave mistake, for example, to sell out Ukraine’s interests and lift the sanctions imposed on Russia out of the mistaken belief that the Kremlin’s assistance is needed in Syria. Cooperation with Russia, however useful and advisable, must not come at the expense of third parties and Western interests and unity. Attempting to redeem past mistakes is not advisable when it means making even bigger ones.

Joschka Fischer was German Foreign Minister and Vice Chancellor from 1998-2005, a term marked by Germany’s strong support for NATO’s intervention in Kosovo in 1999, followed by its opposition to the war in Iraq.

Copyright: Project- Syndicate.